Gut Microbiota

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• Definition
• Introduction
• Signs & Symptoms
• Research Summary

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Executive Summary

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Write an executive summary in the form of a blog article on the topic of "Research into Chinese medicine treatment for Gut Microbiota" summarising the research below and using language that can be easily understood by patients and avoiding medical jargon using a professional and caring tone of voice.

Write an executive summary in the form of a blog article on the topic of "Researched Chinese medicine treatments for Gut Microbiota" summarising the research below in an objective and easy to understand way, and using language that can be easily understood by patients. Group the article into Chinese medicine treatments first, followed by nutrition and other treatments. Avoid using medical jargon and use a professional and caring tone of voice.

Write me a concise but easy to understand executive summary on the topic of "Chinese medicine treatments for Gut Microbiota" based on the following research that I will give you. Your summary should be 2 paragraphs long in Australian English spelling and include references to the studies.

A Randomised Controlled Trial published in 2023 in the journal Complementary Therapies in Medicine found that Changes in gut microbiome associated with a low-fat, vegan diet and cooked soybeans may reduce the frequency and severity of postmenopausal hot flashes. In this study, 84 postmenopausal women experiencing two or more moderate-to-severe hot flashes daily were randomly assigned to a low-fat, vegan diet with daily cooked soybeans or allowed to maintain their usual diet. Over a 12-week period, the frequency and severity of hot flashes were tracked using a mobile application. In 11 women from the group, gut microbiome was analyzed at the start and after 12 weeks of the dietary intervention, using deep shotgun metagenomic sequencing. The women who underwent gut microbiome testing experienced a substantial decrease in total hot flashes during the dietary intervention, and severe hot flashes disappeared entirely in this group. Alpha and beta diversity within the microbiome showed no significant difference in the intervention group between baseline and the end of the 12 weeks. Interestingly, adjustments in the relative abundance of certain bacterial strains, notably Porphyromonas and Prevotella corporis, were linked with the reduction in severe day hot flashes, while changes in the relative abundance of Clostridium asparagiforme were associated with a reduction in total severe hot flashes and severe night hot flashes.

A Cohort Study published in 2023 in the journal Heliyon found that Consuming “Sneznik-1/79” mineral water significantly improves intestinal health and reduces cholesterol in type 2 diabetes patients. The study involved 60 patients with confirmed Type 2 Diabetes, who drank “Sneznik-1/79” mineral water from Serbia daily for 28 days. Researchers conducted standard biochemical tests, including glucose level, lipid profile, and stool analysis. Additionally, blood samples were taken to assess the impact of the water on oxidative stress markers. Post consumption of “Sneznik-1/79” water, a substantial decrease in total cholesterol levels was noted. Notably, all patients experienced regular daily bowel movements, indicating improved intestinal peristalsis. Half of the participants showed elimination of dysbiosis. Furthermore, there was an increase in antioxidants like superoxide dismutase and reduced glutathione, suggesting enhanced antioxidant capacity. The study highlights “Sneznik-1/79” water as a potential complementary treatment for improving gut health and reducing cholesterol in Type 2 Diabetes patients.

A Review Article published in 2023 in the journal Nutrition Reviews found that Berry fruits such as blueberries, cranberries, raspberries, and strawberries could potentially improve gut microbiota and reverse dysbiosis in chronic kidney disease patients. Methodology: This research explores the therapeutic potential of berry fruits, including blueberries, cranberries, raspberries, and strawberries, in relation to modulating gut microbiota in chronic kidney disease (CKD) patients. The fruit’s rich polyphenol and nutrient content are assumed to promote the selective growth of beneficial bacteria, thus improving the clinical status of these patients. The study scrutinizes the impact on the abundance of mucus-producing bacteria and short-chain fatty acids specifically. Discussion of Results: The gathered evidence illustrates that berry fruits, particularly with a daily intake of 5 mg, can promote diversity in the gut microbiota and possibly reverse dysbiosis, a common issue in chronic kidney disease patients. These fruits are found to increase the expression of mRNA involved in gut tight junctions such as occludin, TJP1, and mucin, and they may reduce uremic toxins by controlling the gut microbiota, improving the uremic condition. As such, long-term use of berry fruits could be an effective strategy for CKD patients.

A Animal Study published in 2023 in the journal Foods found that Long-term intake of traditionally made Doenjang, particularly high in certain species, may improve symptoms of estrogen deficiency more effectively than unfermented soybeans. The study involved using four different types of traditionally made Doenjang (TMD), distinguished based on the quantities of certain species and biogenic amines they contained. These were used to observe possible alterations in energy, glucose, and lipid metabolism in estrogen-deficient female rats via potential modification of the gut microbiota. This involved comparing a control group of rats that underwent ovary removal with five other groups that were supplemented with different types of TMD and cooked soybeans. The outcomes revealed that weight gain and visceral fat mass were lower and lean body mass was higher in the TMD and cooked soybean intake groups compared to the control group, however, these figures were not as good as those in the normal control group. Additionally, the hepatic triglyceride content was lower with TMD intake. It was further observed that the intestinal health significantly improved in the TMD groups, and some groups revealed more improvements than others. Concerning gut microbiota, certain groups showed an increase in certain types of organisms, suggesting a benefit from high amounts of the specific species in TMD. The study inferred that TMD rich in certain species correlates positively with the regulation of estrogen-related markers.

A Animal Study published in 2023 in the journal Frontiers in Nutrition found that Kiwifruit polysaccharides may alleviate the toxic effects of acrylamide by improving gut health and enhancing bile acid metabolism. In this study, the team explored the potential protective effects of kiwifruit polysaccharides on disorders induced by acrylamide (a toxic ingredient found in high-temperature, carbohydrate-rich food) on gut microbiota and systemic metabolism. They measured changes in gut microbiota and serum metabolites in mice subjected to acrylamide-induced toxicity, focusing primarily on the effects on mice's bodily features, liver health, and liver enzyme activity. The results revealed that treatment with kiwifruit polysaccharides not only improved the mice's overall health and liver function but also restored the balance in their gut microbiota by increasing microbial diversity and the abundance of beneficial bacteria. Furthermore, it was found that the polysaccharides had a significant impact on amino and bile acid-related metabolic pathways, proving their potential in protecting against toxicity. A strong correlation was also found between certain bacteria and the critical metabolites of bile acid metabolism, providing a deeper understanding of the protective mechanisms of kiwifruit polysaccharides.

A Experimental Study published in 2023 in the journal Food & Function found that Goji berry leaves have stronger anti-colitis effects than mulberry leaves, ameliorating tissue damage and better regulating inflammatory responses and gut microbiota. The research entailed a comparative study conducted on goji berry and mulberry leaves versus their respective fruits. To determine their anti-colitis effects, the experiment was administered to C57BL/6N mice that had been induced with colitis through dextran-sulfate-sodium. Through the utilization of measures such as ELISA and western blotting analysis, researchers were able to observe how each leaf versus its corresponding fruit ameliorated colitic symptoms, tissue damage, and was able to influence the overproduction of certain pro-inflammatory cytokines. The results showed that both the goji berry leaf and fruit significantly reduced symptoms of colitis and improved tissue damage while the mulberry leaf did not show similar improvements. The goji berry leaf exhibited the strongest performance in restraining the overproduction of pro-inflammatory cytokines and further repairing the damaged colonic barrier. It also effectively adjusted gut microbiota equilibrium by increasing beneficial bacteria and decreasing harmful ones. The berries and leaves similarly restored certain dietary fibers to alleviate inflammation, but the mulberry leaf did not achieve this for butyrate. This is the first report to provide a comprehensive contrast of anti-colitis effects between the leaves and fruits of goji and mulberry.

A Animal Study published in 2022 in the journal Food Research International found that Pu-erh tea and its ingredient theabrownin improve liver, jejunum, and adipose tissue functions in metabolic syndrome mice, modulating circadian rhythm, glycerophospholipid, and linoleic acid metabolism. In this study, varied technological applications such as metagenomics, transcriptomics, and metabolomics were utilized to explore the anti-metabolic syndrome mechanism of Pu-erh tea and theabrownin in mice with metabolic syndrome. These scientific technologies allowed the researchers to understand and explore improvements in the physiological functions of liver, jejunum, and adipose tissues in the metabolic syndrome mice as a result of Pu-erh tea and theabrownin interventions. The investigation also focused on changes to the hepatic transcriptome, revealing that both of these interventions had the capacity to regulate the circadian rhythm pathway. The results showcased that both interventions succeeded in the modulation of glycerophospholipid and linoleic acid metabolism, this was established through a comprehensive analysis of serum and brain metabolome. Further analysis of faecal metagenome demonstrated an increase in the relative abundance of certain bacterium and a decrease in others due to both interventions. However, in comparison to Pu-erh tea, theabrownin exhibited a more pronounced influence as regards upregulating hepatic antioxidants and downregulating hepatic inflammatory factors, although there was only a slight reduction in obesity-linked short-chain fatty acids in faeces of the metabolic syndrome mice. Overall, the experiment provided essential insights into the various ways these two elements function and provide treatment for metabolic syndrome.

A Experimental Study published in 2022 in the journal Food Chemistry found that Pu-erh tea, through the increase of Cinnabarinic acid, can improve obesity induced by circadian rhythm disorders by enhancing fat metabolism and altering gut microbes. In this study, a CRD-induced obesity model in mice was developed and Pu-erh tea was used as an intervention. The effect of Pu-erh tea on obesity was observed and determined to come from its production of Cinnabarinic acid (CA). CA was found to promote adipose tissue lipolysis and heat generation response, increasing the sensitivity of fat cells to hormones and neurotransmitters. This was accomplished by targeting the expression of specific receptor proteins in adipose tissue. These processes improved mitochondrial activity in the fat cells and expedited metabolic processes in the adipose tissue, thereby speeding up glucose and fat metabolism. In the final stage of the study, CA was found to make changes in the gut microbiota and short-chain fatty acids which further helped to improve the lipid accumulation mediated by CRD. The researchers concluded that the increase in CA, caused by drinking Pu-erh tea and reaching the fat tissue through blood circulation, could be a crucial mechanism to reduce obesity induced by circadian rhythm disorders.

A Systematic Review published in 2022 in the journal Frontiers in Nutrition found that Meta-analysis indicates that fruit consumption, particularly kiwifruits, effectively alleviates constipation symptoms, offering valuable insights into improving gut health. A meta-analysis of 11 randomized controlled trials (RCTs) examined the effects of fruit consumption on patients with functional constipation. The analysis revealed that fruit consumption, particularly kiwifruits, significantly increased stool frequency, improved stool consistency, and positively impacted microbiota composition, suggesting a potential dietary approach for managing constipation symptoms.

A Review Article published in 2022 in the journal Biomedicine & Pharmacotherapy found that Pomegranate extract and its phytochemicals can potentially inhibit severe acute respiratory syndrome coronavirus 2 (SARS-COV-2) and improve gut microbiota, preventing obesity and diabetes. The study employs the use of in silico molecular docking methodologies to demonstrate that extract from pomegranates and their phytochemicals can serve as inhibitors of severe acute respiratory syndrome coronavirus 2's spike protein and the angiotensin-converting enzyme 2 receptor contact. These findings are further reinforced by clinical trials which suggest that pomegranates can also alleviate non-alcoholic fatty liver disease, metabolic syndrome, dental infections, and symptoms of menopause. This study has also identified numerous active compounds within pomegranates such as alkaloids, anthocyanidins, tannins, flavonoids, phenolics, proanthocyanidins, sterols, terpenes, terpenoids, xanthonoids, fatty acids, organic acids, lignans, saccharides, and vitamin C. This mixture of active compounds is believed to significantly contribute to the broad array of pharmacological activities identified within the pomegranate. This includes anti-diabetic, anti-tumor, anti-inflammatory, anti-malaria, anti-fibrotic, anti-fungal, and anti-bacterial effects. The extract from this fruit improves gut microbiota which could potentially aid in the prevention of obesity and diabetes.

A Experimental Study published in 2022 in the journal Frontiers in Nutrition found that Goji berry supplementation can potentially improve gut microbiota and prevent liver injury caused by acute alcohol consumption. In this study, the effects of Goji berry supplementation on liver injury induced by acute alcohol intake were examined. Over a 14-day period, the changes in liver enzyme levels, pro-inflammatory cytokine levels, and lipopolysaccharide content in the liver tissue were observed. In addition, the integrity of the epithelial barrier and levels of butyric acid in the cecum were also evaluated. The direct relationship between gut microbiota modifications and liver protective effects was mainly established via antibiotic treatments and fecal microbiota transplantation experiments. The results revealed that Goji supplementation helped maintain liver health by lowering liver injury indicators, maintaining the epithelial barrier's integrity, and increasing the butyric acid levels in the cecum content. The same types of effects were observed for Goji and fecal microbiota transplantation treatments. These maneuvers increased the glutathione levels in the liver and selectively promoted the growth of certain gut bacteria. The metabolite analysis showed that Goji berries and its trained microbiota were able to regulate specific metabolic compounds, shedding light on the interplay between Goji, gut microbiota, and liver homeostasis.

A Animal Study published in 2022 in the journal Frontiers in Nutrition found that Cooked adzuki beans contribute notably to preventing obesity and regulating gut microbiota composition, while also alleviating systemic inflammation and metabolic disorders. The methodology involved a controlled experiment where mice were fed diets of varying lipid content: a low-fat diet or a high-fat diet. The specific twist in this experiment was the inclusion or exclusion of cooked adzuki beans to their diet, ensuring 15% of the diet comprised of this. The duration of this dietary regimen was 12 weeks. In the discussion of results, it was discovered that cooked adzuki beans provided key beneficial effects. This included a significant inhibition of weight gain and hepatic steatosis, a reduction in high levels of specific markers such as serum triacylglycerol, alanine aminotransferase, and aspartate aminotransferase, providing a counter to systemic inflammation and metabolism-related endotoxemia commonly found in those consuming a high-fat diet. Moreover, the inclusion of adzuki beans positively affected the gut microbiota composition, reducing fat-inducing bacteria and enriching the gut with beneficial bacteria to help alleviate inflammation and metabolic disorders associated with high-fat diets.

A Cohort Study published in 2022 in the journal Journal of Ethnopharmacology found that Shenling Baizhu San (SBS), combined with mesalamine, can treat ulcerative colitis effectively by changing gut microbiota structures and increasing tryptophan metabolite levels. The methodology involved conducting a prospective cohort study to explore the potential therapeutic effects of SBS, used as a complementary medicine with mesalamine, on ulcerative colitis patients. There were 48 patients included in the study, out of which 24 were a part of the control group and given just mesalamine, while the remaining patients in the experimental group were administered mesalamine along with SBS. The efficacy of these treatments was evaluated after an elapsed period of 8 weeks. The study utilized procedures like 16S rRNA sequencing to observe the structures of gut microbiota (GMB), and UPLC-MS/MS to analyze microbial tryptophan metabolites. In terms of results discussion, the study noticed that the combination of SBS and mesalamine significantly enhanced the clinical symptoms of ulcerative colitis. This was observed through mucosal healing and reduced damage to the colon that the medicinal combination induced. The research also highlighted a novel discovery, the alteration of gut microbiota structures, and an observable increase in microbial levels of tryptophan metabolites when both SBS and mesalamine were used. This led to the conclusion that SBS acted as an effective supplementary therapy to the standard treatment, easing ulcerative colitis through an identified GMB-tryptophan metabolite axis.

A Experimental Study published in 2022 in the journal Antioxidants found that Berries, largely due to their phenolic compounds, enhance internal antioxidant status and positively influence gut microbiota composition, promoting beneficial bacteria and suppressing harmful types. The study compared the antioxidant capacities and gut microbiota modulatory effects of nine popular berries: blackberry, black goji berry, blueberry, mulberry, red Chinese bayberry, raspberry, red goji berry, strawberry, and white Chinese bayberry. The anthocyanin profiles of each berry were identified using Ultra-performance liquid chromatography (UPLC) coupled with Triple TOF/MS. The antioxidant capacities were evaluated through four chemical assays (DPPH, ABTS, FRAP, and ORAC). Healthy mice were treated with different berry extracts for two weeks as a means of investigating in vivo antioxidant capacity and gut microbiota modulatory effects. In terms of the results, it was observed that majority of the berries improved the internal antioxidant status, indicated by elevated serum or colonic Total Antioxidant Capacity (T-AOC), Glutathione (GSH), Total Superoxide Dismutase (T-SOD), Catalase (CAT), and Glutathione Peroxidase (GSH-PX) levels, along with a decrease in Malondialdehyde (MDA) content. All berries studied notably altered the gut microbiota composition, with most leading to the enrichment of beneficial Short Chain Fatty Acids (SCFAs)-producing bacteria and the curbing of potentially harmful bacterial types.

A Review Article published in 2022 in the journal Journal of Medicinal Food found that Omega-3 fatty acids can help prevent and manage chronic inflammatory diseases, including ulcerative colitis and rheumatoid arthritis, through influencing gut microbiota. The study primarily encompasses a review of both experimental and clinical studies on the influence of omega-3 fatty acids on chronic inflammatory conditions, with the attention being specifically focused on those diseases with an autoimmune background. The study highlights the role of these fatty acids in maintaining bodily homeostasis, as well as the enzymatic processes they trigger within the body upon ingestion. Natural sources of omega-3 are also explored, emphasizing the importance of maintaining a healthy and balanced diet. In their exploration of omega-3's impact on inflammatory conditions, the researchers revisit the pathogenesis of ulcerative colitis and rheumatoid arthritis under the theoretical approach of gut microbiota dysbiosis. This approach emphasizes the role of the gut in maintaining health and identifies how imbalances can contribute to the development and persistence of these conditions. The researchers propose that omega-3 fatty acids are able to prevent and control these conditions, which are significant contributors to global chronic health burden and can lead to severe complications and disabilities if not treated. The potential of omega-3's to prevent severe illness in cases of COVID-19 infection through immune system modulation and control of the inflammatory process is also briefly explored.

A Review Article published in 2022 in the journal Journal of Traditional Chinese Medical Sciences found that Pu-erh tea possesses therapeutic mechanisms potentially beneficial for metabolic diseases due to its interaction with liver and gut microbiome. The methodology of this research involved reviewing and summarising the processing elements and bioactive components of pu-erh tea. Extensive study of relative human and animal trials was conducted, and the potential therapeutic mechanisms of this tea were examined and extrapolated. In discussing the results, it was discovered that pu-erh tea evidently has beneficial effects on metabolic diseases, such as hypocholesterolemic and hypolipidemic effects. The research points to the conclusion that the tea's interaction with the liver and gut microbiome is the major contributing factor to these health benefits. It helps regulate tea biotransformation and endogenous metabolism, underlining the tea's potential use in therapeutic interventions.

A Review Article published in 2022 in the journal Nutrients found that Equol, a powerful estrogen-like compound derived from soy, could be key to better health in postmenopausal women if gut microbiome could be altered to facilitate its production. The methodology of this research involved looking closely at the properties and actions of equol, a metabolite of the soy isoflavone daidzein. This substance is produced through the process of intestinal bacterial metabolism, but the ability to produce it is not present in over half of the human population due to the absence of specific equol-producing bacteria in the gastrointestinal tract. Given that the make up of the gut microbiome varies from person to person, understanding the effects of equol and daidzein in the human body has been a complex task. Furthermore, the fact that rodents easily produce equol complicates the matter, as findings from rodent models may not directly apply to humans. While interpreting the results, it was found that equol, due to its strong estrogenic activity, could potentially be an excellent means to manage postmenopausal symptoms and overall health. However, the ability to produce equol varies significantly among people, based on the bacterial microflora of their gut. Therefore, the benefits of equol could potentially be amplified by finding effective methods to manipulate the gut microbiome to foster equol production, a strategy that could lead to improved health outcomes for postmenopausal women.

A Review Article published in 2022 in the journal Critical Reviews in Food Science and Nutrition found that Goji berries, notably their polysaccharides, exhibit protective effects against inflammatory bowel disease through the preservation of healthy gut microbiota. The review encompassed an in-depth analysis of current literature specially focusing on the role of goji berry and its important functional constituents in countering Inflammatory Bowel Disease (IBD). The core attentiveness of the research is directed towards understanding the interplay between goji berries, particularly their polysaccharides, and gut microbiota. The goji berries’ protective effects were evaluated, focusing on how they curb disruption in gut microbiota, a common facet in IBD. The review concluded that goji berries, especially their polysaccharides, demonstrated appreciable benefits in averting gut microbiota disturbances seen with IBD, thus protecting against this condition. These natural substances, present in goji berries, function as prebiotics, which maintain a balanced gut microbial ecosystem. The research further revealed that proper functioning of gut microbiota and their metabolites was a crucial element in mediating these beneficial effects against IBD, thus cementing the role of dietary interventions in managing diseases linked with gut health.

A Systematic Review published in 2022 in the journal The American Journal of Chinese Medicine found that Fresh and dried ginger displays key botanical, phytochemical and ethnopharmacological differences, which are fundamental for their specific clinical uses in treating gastrointestinal issues. The methodology used in the research involved a retrospective comparison between Sheng Jiang (SJ, meaning fresh ginger) and Gan Jiang (GJ, meaning dried ginger), two traditional Chinese herbs. The comparison was undertaken specifically considering aspects of botany, phytochemistry, and ethnopharmacology. The research also delved into exploring the traditionally attributed use of ginger, in both its fresh and dried forms, for the treatment of gastrointestinal disorders, and its relationship with human gut microbiota - an aspect that hasn't been considered extensively previously. The results displayed notable differences between fresh and dried ginger in terms of botany, phytochemical, and ethnopharmacological properties. Fresh and dried ginger are cultivated differently and display distinct physical appearances. This research proposed that these differences lay the foundation for how these two forms of ginger are applied clinically. Furthermore, discussing the pharmacology of gut microbiota-related gastrointestinal benefits, it is suggested that fresh and dried ginger could present innovative and potent avenues for preventing and treating gastrointestinal disorders.

A Experimental Study published in 2021 in the journal Frontiers in Immunology found that Consuming oats significantly lessens total and LDL cholesterol levels and mediates a prebiotic effect on the gut microbiome, contributing to its cholesterol-lowering ability. In a randomized controlled study, 210 mildly hypercholesterolemic subjects from three various study centers across China were assigned to consume either 80 g of oats or rice daily for 45 days. To ascertain the effects of these diets, measurements were taken of the participants' plasma lipid profiles, short chain fatty acids (SCFAs), and fecal microbiota. Following 30 and 45 days of adherence to these diets, there was a pronounced reduction in total cholesterol (TC) and non-high-density lipoprotein cholesterol (non-HDL-C) in both the oat-consuming and rice-consuming participants. This decrease was more articulated amongst the oat consumers by the 45th day. The consumption of oats led to a significant increase in the abundance of certain beneficial gut microbiota and a corresponding decrease in unclassified harmful types. These microbiota demonstrated associations with changes in plasma lipid levels and SCFAs. The comprehensive findings strongly suggest that the cholesterol-reducing effect of oats may be largely down to its prebiotic activity, which modulates the gut microbiome.

A Review Article published in 2021 in the journal Nutrients found that Fresh Hass avocados have been found to reduce cardiovascular disease risk, assist weight loss, improve cognitive function, and promote colonic microbiota health. The methodology used in this comprehensive review entailed conducting 19 clinical trials, five observational studies, and examination of several biological mechanisms. These focused on understanding and identifying the primary health effects of Hass avocados in different population groups such as healthy overweight or obese adults, older normal-weight adults, and overweight or obese women. The effects were thoroughly measured in terms of cardiovascular health, body weight, cognitive function, and colonic microbiota health. The primary health effects of Hass avocados were then linked to its unique nutritional properties - the unsaturated to saturated fat ratio, the presence of multifunctional prebiotic and viscous fiber, its low energy density, and the increase in carotenoid absorption facilitated by its oleic acid and water emulsion, particularly when combined with low-fat fruits and vegetables. The results indicated significant positive effects from consuming Hass avocados, especially when incorporated into a healthy dietary plan like the Mediterranean diet. Consumption of avocados was found to lead to reduced cardiovascular disease risk in healthy overweight or obese adults, primarily by undesirable cholesterol profiles and promoting vascular health. For overweight or obese women, it helped in weight reduction and lessened visceral fat tissue. The consumption of avocados improved cognitive function in both older normal-weight adults and young to middle age overweight adults, particularly their executive function. It was also found to enhance colonic microbiota health in overweight or obese individuals by fostering healthier microflora and fecal metabolites.

A Systematic Review published in 2021 in the journal Nutrients found that Almond-based diets may be effective in promoting short-chain fatty acid-producing bacteria and lowering glycated haemoglobin and body mass index in patients with type 2 diabetes compared with control. The research was a systematic review and meta-analysis, conducted using the preferred reporting items for systematic review and meta-analysis methodology. Diverse databases, including the Health Sciences Research Databases via EBSCOhost, Google Scholar, EMBASE, and other article's reference lists, were thoroughly searched following the population, intervention, control, outcome, and study framework. The searches encompassed all relevant studies available from the inception of these databases until August 1, 2021. Nine randomised studies were analysed, eight of which were used for the meta-analysis. Results revealed that diets rich in almonds foster the growth of gut bacteria that produce short-chain fatty acids. Additionally, the analysis demonstrated that such diets effectively reduce both glycated haemoglobin levels and body mass index in patients with type 2 diabetes. However, the effects of almonds were not significant concerning fasting blood glucose, 2-hour postprandial blood glucose, various inflammatory markers, and certain other indicators of diabetes. The biological mechanisms attributed to reductions in glycated haemoglobin and body mass index are thought to be related to the nutritional composition of almonds, namely their high fibre content and low glycaemic index.

A Animal Study published in 2021 in the journal Nutrients found that Adzuki beans, when added to a high-fat diet, lessen obesity, improve liver function, enhance insulin sensitivity, and balance gut microbiota. In the experiment, mice were placed on one of three diets for 12 weeks: a low-fat diet, a high-fat diet, or a high-fat diet supplemented with 15% adzuki beans. The study observed and tested for changes related to obesity, lipid accumulation, serum lipid and lipopolysaccharide levels, liver function, hepatic steatosis, glucose homeostasis, insulin sensitivity, and gut microbiota imbalances. Through a process called PICRUSt2 analysis, the researchers were then able to draw potential associations between changes in the gut microbiota and the metabolism of various substances. In the discussion of the results, the supplementation of adzuki beans to a high-fat diet had a significant impact. Obesity and lipid accumulation were visibly reduced, as were negative impacts on liver function and unhealthy levels of serum lipids and lipopolysaccharides. Notably, glucose homeostasis was improved through an increase in insulin sensitivity. The imbalances in gut microbiota, typically seen in a high-fat diet, were significantly reversed through adzuki bean supplementation. High-fat diet dependent taxa returned to a more normal status, which in turn suggested associations with the metabolism of carbohydrates, lipids, sulfur, and two types of amino acids.

A Review Article published in 2021 in the journal Food Chemistry found that Pu-erh tea, with its complex components, interacts greatly with gut microbiomes and holds significant potential for healthcare applications. Pu-erh tea undergoes a post-fermentation process involving various microorganisms, leading to highly complex components. This tea has its potential benefit due to its rich interactions with the gut microbiomes; the structure and the homeostasis of which are deeply connected to human wellness and progress of various diseases. This study provides a systemic review of the current findings pertaining to the bioactive components of Pu-erh tea and their interactions with gut microbiomes. For the discussion of results, the beneficial effects of Pu-erh tea on gut microbiomes may establish its role in healthcare. These benefits are due to the tea's bioactive components' impacts on the structure of the gut microbiomes, and subsequent health improvements. Additionally, the establishment of "components-function-indicators" clues can propel the standardisation of the tea's fermentation process and development of functional tea-related products.

A Systematic Review published in 2021 in the journal Chinese Medicine found that A variety of Chinese herbal medicines have been reported to effectively prevent or treat nonalcoholic fatty liver disease by regulation of the gut microbiota and the gut-liver axis. The key roles of CHMs in the regulation of gut microbiota and the gut-liver axis along with their mechanisms (such as modulating intestinal permeability, reducing the inflammatory response, protecting liver cells, improving lipid metabolism, and modulating nuclear receptors), were well summarized. All the knowledge and information presented here will be very helpful for researchers to better understand the applications and mechanisms of CHMs for treatment of NAFLD.

A Systematic Review published in 2021 in the journal International Journal of Biological Macromolecules found that Polysaccharides from tremella fuciformis can attenuate ulcerative colitis. The purpose of this paper was to explore the therapeutic effect and underlying mechanism of Tremella fuciformis polysaccharides (TFP) on ulcerative colitis (UC) based on dextran sodium sulfate (DSS)-induced mice UC model and lipopolysaccharide (LPS)-stimulated Caco-2 cells model. The results firstly indicated that TFP can significantly alleviate the symptoms and signs of the DSS-induced mice UC model, which manifests as improvement of body weight loss, increase of colon length, decrease of colon thickness and reduction of intestinal permeability. Then, results from histopathological and electron microscope analysis further implied that TFP could dramatically reduce inflammatory cells infiltration and restore intestinal epithelial barrier integrity. In addition, the experiments of LPS-stimulated Caco-2 cells model in vitro also further confirmed that TFP could markedly inhibit the expressions of pro-inflammatory cytokines and increase related genes or proteins expressions of intestinal barrier and mucus barrier. Taken together, these data suggested that TFP has a significant therapeutic effect on DSS-induced UC model, and its mechanisms are closely linked to the inhibition of inflammation and the restoration of intestinal barrier and mucus barrier function. These beneficial effects may make TFP a promising drug to be used in alleviating UC.

A Systematic Review published in 2021 in the journal International Journal of Biological Macromolecules found that Tremella fuciformis polysaccharides effectively reduce inflammation in ulcerative colitis, promoting healing by restoring intestinal and mucus barrier functions. In this study, two models were utilized to investigate the impacts of Tremella fuciformis polysaccharides on ulcerative colitis: a dextran sodium sulfate-induced mice model and a lipopolysaccharide-stimulated model using Caco-2 cells. First, the dextran sodium sulfate-induced mice ulcerative colitis model was administered with the Tremella fuciformis polysaccharides. Effects were observed across several indicators such as body weight, colon length, and thickness, as well as intestinal permeability. Following that, histopathological analysis and electron microscope examinations helped delve deeper into the relationship, uncovering a reduction in inflammatory cell infiltration and a restoration of the intestinal epithelial barrier integrity. The lipopolysaccharide-stimulated Caco-2 cells model was used to further understand the role of these polysaccharides in reducing expressions of pro-inflammatory cytokines and increasing expressions related to intestinal barrier and mucus barrier.

A Review Article published in 2021 in the journal Nutrients found that Almonds can support colonic microbiota health by promoting microflora richness and diversity, increasing the ratio of symbiotic to pathogenic microflora, and concentrations of health-promoting colonic bioactives. This narrative review of 64 RCTs and 14 meta-analyses and/or systematic reviews presents a more in-depth analysis of almond clinical trials and their effects on weight measures, metabolic health biomarkers and outcomes, and colonic microbiota health than typically described in systematic reviews and/or meta-analyses. Almonds have one of the largest portfolios of RCTs on weight measures, metabolic health, and colonic microbiota of any food. These RCTs consistently support an important role for almonds in reducing body and fat mass, other weight measures, and promoting metabolic health as a premier snack for precision nutrition diets

A Review Article published in 2021 in the journal Nutrients found that Recent systematic reviews and meta-analyses of nut RCTs showed that almonds were the only nut that had a small but significant decrease in both mean body mass and fat mass, compared to control diets. The biological mechanisms for almond weight control include enhanced displacement of other foods, decreased macronutrient bioavailability for a lower net metabolizable energy (ME), upregulation of acute signals for reduced hunger, and elevated satiety and increased resting energy expenditure.

A Review Article published in 2021 in the journal Gastroenterology Insights found that Tea polyphenols can help rebalance gut microbiota, alleviating imbalances caused by obesity, diabetes, and UV damage, with effects varying by tea type. The methodology of this review involved the process of collecting and analyzing various studies dealing with the effects of tea polyphenols on gut microbiota in both humans and animals. This included studies observing the overall gut health in relation to conditions such as obesity, diabetes, and UV damage. The comparative approach was used to differentiate the effects of different types of tea on distinct bacterial taxa present in the gut. In discussing the results, it was found that tea polyphenols consistently improved and diversified gut microbiota in animal tests. In contrast, while human trials also showed improved gut health seemingly due to a prebiotic-like effect of tea polyphenols, the evidence was not as conclusive. However, the outcomes did show that different types of teas had differing effects on the bacterial taxa present in the gut.

A Experimental Study published in 2021 in the journal International Journal of Molecular Sciences found that Two French natural mineral waters (NMW1 and NMW2) show anti-inflammatory effects and can reduce intestinal inflammation in mice with induced colitis. The study investigated the anti-inflammatory effects of two French natural mineral waters (NMWs) - NMW1 (rich in calcium, magnesium, sodium, carbon, and iron) and NMW2 (mainly bicarbonate) - on intestinal inflammation. Intestinal epithelial cells were stimulated with heat-inactivated Escherichia coli or hydrogen peroxide and then treated with NMWs. Additionally, moderate colitis was induced in Balbc/J mice using 1% dextran sulfate sodium. These mice were then given either NMW1, NMW2, or control water. The study assessed general symptoms, histological features of colitis, fecal lipocalin-2 levels, pro-inflammatory KC cytokine levels, and the global mucosa-associated microbiota. Both NMW1 and NMW2 showed anti-inflammatory effects in treated intestinal cells. In the colitis-induced mice, NMW1 notably reduced inflammation, evidenced by lower disease activity scores, reduced fecal lipocalin-2, decreased release of pro-inflammatory KC cytokines, and smaller intestinal epithelial lesions. NMW1 also helped in maintaining the normal state of mucosa-associated microbiota. These findings suggest the potential of these NMWs in managing inflammatory bowel disease through modulating gut microbiota.

A Systematic Review published in 2021 in the journal Angiology found that Epidemiological studies suggest that the consumption of spicy chilli food is associated with reduced risk of all-cause as well as heart disease–related mortality. This systematic review and meta-analysis examined the association between spicy food (chilli pepper, chilli sauce, or chilli oil) consumption with cardiovascular and all-cause mortality. Medline and EMBASE were searched from their inception until February 2020 to identify relevant prospective cohort studies. Hazard ratios (HRs)/relative risk (RRs) were pooled via random-effect meta-analysis. Of the 4387 citations identified, 4 studies (from the United States, China, Italy, and Iran) were included in the meta-analysis. The included studies involved a total of 564 748 adults (aged ≥18 years; 51.2% female) followed over a median duration of 9.7 years. The pooled data suggested that compared with people who did not regularly consume spicy food (none/<1 d/wk), regular consumers of spicy food experienced a 12% (HR/RRpooled 0.88, 95% CI, 0.86-0.90; I 2 = 0%) lower risk of all-cause mortality. Moreover, spicy food consumption was associated with significant reduction in the risk of death from cardiac diseases (HR/RRpooled 0.82, 0.73-0.91; I 2 = 0%), but not from cerebrovascular disorders (HR/RRpooled 0.79, 0.53-1.17; I 2 = 72.2%). In conclusion, available epidemiological studies suggest that the consumption of spicy chilli food is associated with reduced risk of all-cause as well as heart disease–related mortality. Further studies in different populations are needed to confirm this association.

A Randomised Controlled Trial published in 2021 in the journal Journal of Functional Foods found that Enriching a regular diet with oat β-glucan can improve glycemic control, augment feelings of fullness, and positively modulate gut microbiota in individuals with type-2 diabetes. The research involved 37 subjects with type-2 diabetes, who were required to consume either oat β-glucan or microcrystalline cellulose as a control dietary supplement each day for a period of 12 weeks. The parameters assessed throughout the study included fasting glucose, insulin, a variety of hormones and peptides regulating appetite (like ghrelin, leptin, GLP-1, PYY), caloric intake, and the profile of their intestinal microbiota. The results indicated a decrease in HbA1c, insulin, C-peptide levels, as well as certain bacterial populations (Lactobacillus spp, and Butyrate-producing bacteria) in subjects who consumed β-glucan. Significant differences were observed in levels of certain hormones, namely leptin, GLP-1, and PYY, between the two groups. The intake of oat β-glucan emerged as a potential strategy to manage type-2 diabetes, by improving glycemic control, enhancing feelings of satiety, and fostering a healthier gut microbiota profile.

A Review Article published in 2021 in the journal Physiological Research found that Tea and coffee possess health promoting properties and can effectively prevent and treat metabolic disorders, including obesity, through the suppression of fat storage. The paper provides a detailed review of the origin, chemical composition and properties of tea and coffee, including the health benefits associated with them. It specifically focuses on their impacts on fat storage and the potential physiological mechanisms behind their effects. The potential health effects of these plants are attributed, in part, to the presence of caffeine. Additional physiological and medicinal benefits could be linked to other molecules such as theaflavins, catechins, their metabolites and polyphenols found in tea and polyphenol chlorogenic acid in coffee. In the discussion, the paper points out that both tea and coffee can be instrumental in preventing and treating a host of metabolic disorders including metabolic syndrome, cardiovascular diseases, type 2 diabetes and obesity. The mechanism these plants employ to bring about these health benefits is through the reduction of fat storage by suppressing adipocyte functions and supporting gut microbiota. Moreover, tea also exhibits an ability to prevent obesity by reducing appetite, food consumption and food absorption in the gastrointestinal system, as well as modifying the fat metabolism.

A Experimental Study published in 2020 in the journal Journal of Water and Health found that Mineral water increases the diversity of gut microbiota by aiding the growth of Bacteroidetes taxa. The researchers carried out the study on BALB/c mice, focusing specifically on the bacterial community in their feces and how it responds to different types of drinking water. These types included commercial bottled mineral water, natural water, purified water, and tap water. After culturing the feces in a combination of brain heart infusion broth dissolved in the four water types, they conducted a 16S rRNA gene analysis to study the bacterial composition. The bacterial composition varied significantly between the four different types of drinking water. Over time, the overall number of Operational Taxonomic Units (OTUs) decreased, with the exception of cultures grown in mineral water under aerobic conditions. Under these conditions, by the fifth day, alpha diversity differences were particularly noticeable when comparing mineral water with the other types. The most unique taxa were found within the mineral water group. Notably, the Bacteroidetes taxa showed the most significant differences, dominating in the mineral water compared to the other types of water. This indicates that using mineral water as a culture medium could lead to a progressive increase in gut microbiota diversity.

A published in 2020 in the journal Nutrients found that Cocoa polyphenols promote gut health by favorably altering gut microbiota composition and producing secondary bioactive metabolites with antioxidant and anti-inflammatory properties. The study revolves around observing the effects of dietary intake of cocoa polyphenols, bioactive compounds with antioxidant and anti-inflammatory properties, on gut microbiota. These polyphenols have poor absorption in the gut and hence, rarely enter the systemic circulation in their natural forms. Instead, through a bidirectional interaction with the gut microbiota, they stimulate the proliferation of beneficial bacteria and inhibit the growth of harmful ones, thereby acting as a prebiotic. The resulting metabolites from this interaction are bioavailable, and these enter the circulation to reach target organs. The metabolites exhibit substantial antioxidant and anti-inflammatory activities, which improve gut health. These actions augment immunity and reduce the risk of many diseases, documenting a notable health-protective potential of cocoa polyphenols, routed via modulation of gut microbiota composition.

A Experimental Study published in 2020 in the journal Nutrients found that Unpasteurised milk and dairy products intake could potentially alter gut microbiome composition which may influence psychological functioning. In this observational study, the impact of dietary change involving unpasteurized dairy consumption on gut microbiota and psychological state was observed among participants of a 12-week residential cookery course on an organic farm. Twenty-four participants, who primarily consumed food from the farm including unpasteurised milk and dairy products, provided faecal samples at the beginning and end of the course. Concurrently, they completed self-report questionnaires touching on mood, anxiety, and sleep aspects and nutrient intake was monitored via a food frequency questionnaire. Gut microbiota analysis was carried out using 16S rRNA gene sequencing and measurement of faecal short chain fatty acids. Post-course, there was a significant growth in the relative abundance of a specific bacterial genus in the gut, associated with unpasteurised milk and dairy product intake. Furthermore, an increase in a particular faecal short chain fatty acid, valerate, was observed together with an elevation in the functional richness of the microbiome profile. The latter was determined by measuring the predicted neuroactive potential using a unique gut-brain module approach. Despite safety concerns, the consumption of unpasteurised milk and dairy products seemed to promote the growth of probiotic bacterial genus, known to be beneficial for various physical and mental health outcomes.

A Animal Study published in 2020 in the journal Food Research International found that Adzuki bean paste consumption can reduce fat accumulation in rats by lowering energy intake and altering gut microbiota composition. The study evaluated the impact of adzuki bean paste (ABP) on visceral fat accumulation in rats by administering different doses of ABP - 30% and 58.9% in their diets for a period of 28 days. ABP, being a good source of indigestible carbohydrates with fiber and resistant starch, forms an influential part of the rats' diet. The daily dietary energy intake was observed during this period, with particular attention to fecal lipid and fecal acidic sterol excretions, which were found to be increased in a dose-dependent manner. Certain observations within the body of the rats, including the condition of cecal content and fecal moisture, were also monitored. In discussing the results of administrating ABP in the diet, it was observed that visceral fat accumulation and serum lipid levels were reduced. Both groups of rats - those given a diet with 30% ABP and those with 58.9% ABP - showed significantly higher cecal acetic, propionic, and n-butyric acids and lowered cecal pH, regardless of the ABP dose. The ABP diet also reflected altered microbial community data, with higher alpha-diversities than a control group. The study further revealed through cecal bacterial 16S rRNA gene sequencing that the ABP supplemented diets also impacted the ratio of two types of bacteria, Firmicutes, and Bacteroidetes. The findings hence suggest that the cecal fermentation of fiber and resistant starch in ABP was instrumental in reducing fat accumulation.

A Review Article published in 2020 in the journal Food Bioscience found that Different varieties of dates pose impressive nutritional profiles and exhibit multiple health benefits, including anti-cancer, anti-inflammatory, and cholesterol lowering potential. The study embarked on a systematic literature review, utilizing the Scopus, Centre for Agriculture and Bioscience International, Google Scholar and Web of Science databases to assess works published from 1971 to 2017, resulting in 270 relevant articles. The focus was to evaluate the nutritional profile and nutraceutical attributes of different date varieties worldwide, particularly from their cultivation hotspots in West Asia and North Africa. The findings indicate that date fruit is a rich, affordable source of numerous nutrients, including carbohydrates, proteins, amino acids, dietary minerals, vitamins, and various health-promoting compounds such as polyphenols, anthocyanins, tannins and flavones. The fruit's constituents, particularly beta-glucan, show a vast array of beneficial effects on health, functioning as antioxidant, anti-tumor, immune-modulating, anti-diabetic, and cholesterol-lowering agents, as well as promoting beneficial gut microflora growth. Preclinical studies also underline the beneficial effects of date fruit in protecting against a range of health conditions like cardiovascular disease, diabetes, and various forms of cancer. The positive health impacts were observed in different parts of the fruit, namely the flesh, peel, and pits.

A Network Pharmacology published in 2020 in the journal Nutrients found that Ganpu tea, derived from Pu-erh tea and the pericarp of Chachi, enhances antioxidant capacities and modulates gut microbiota beneficially more than Pu-erh tea alone. A thorough chemical analysis was conducted on hot-water extracts of Ganpu tea using ultra-high performance liquid chromatography and quadrupole-time-of-flight tandem mass spectrometry, which identified a total of 92 constituents. Considering the antioxidant properties of Ganpu tea, an experiment was designed and carried out where rats were fed with Ganpu tea over a long period. The same experiment was done using Pu-erh tea and the pericarp of Chachi separately, allowing for comparisons of antioxidant capacities between them and Ganpu tea. The results showed that Ganpu tea had a substantial impact on improving the activities of superoxide dismutase and glutathione peroxidase, both essential antioxidants, more than Pu-erh tea. This indicated a superior antioxidant capacity of Ganpu tea. Further, it significantly increased the abundance of specific gut bacteria, offering a suggestion of the potential benefits of Ganpu tea in human gut microbiota modulation. The results underscore the health benefits of Ganpu tea in enhancing antioxidant activities and promoting beneficial gut microbiota.

A Experimental Study published in 2020 in the journal Biomedicine & Pharmacotherapy found that Goji berry polysaccharide can enhance intestinal microbiota and beneficial bacteria levels, whilst modulating the innate immune response. The study used both in vitro and in vivo methodologies to evaluate the prebiotic effect of Lycium barbarum polysaccharide (LBP), and its potential impact on the composition of fecal microbiota and the innate immune response. In vitro studies showed that LBP supported the growth of selective probiotic bacteria. For the in vivo portion of the study, mice were given LBP, and subsequent alterations in their fecal microbiota were observed. The results demonstrated that the administration of LBP significantly increased the abundance of certain beneficial bacteria within the mice's intestinal microbiota. Specifically, the presence of Proteobacteria and Firmicutes were enhanced, while the ratio of Bacteroidetes was reduced. At the genus level, the presence of potentially probiotic genera like Akkermansia, Lactobacillus, and Prevotellaceae increased. It was also observed that the concentrations of TGF-β and IL-6 in serum and sIgA in colon content significantly heightened. The study also noted a significant difference in the thymus and spleen indices of mice treated with LBP when compared to a control group.

A Theoretical Article published in 2019 in the journal Frontiers in Nutrition found that Consumption of oat β-glucan may lower cholesterol and risk of cardiovascular disease by altering gut bacteria and their effects on bile acid and cholesterol metabolism. The research paper focused on studying the impact of oat β-glucan on cholesterol levels and cardiovascular disease risk. The methodology revolved around examining how consumption of oat β-glucan might change the gut microbiota, particularly bacterial species that influence bile acid metabolism and the production of short chain fatty acids. These factors are crucial regulators of cholesterol homeostasis in the host body. The research thus looked into the repercussions on bile acid metabolism, reverse cholesterol transport, short-chain fatty acid production, bacterial metabolism of cholesterol, and microbe-host signaling. The researchers found that oat β-glucan appears to have a significant effect on both the host's cholesterol levels and the composition and functionality of their gut microbiota, which in turn impacts bile acid metabolism and cholesterol homeostasis. It creates a potentially beneficial scenario where intestinal cholesterol may be removed for excretion. The results suggest that the benefits attributed to oat β-glucan are multifaceted and likely involve the regulation of complex interactions between microbes and the host at the level of the gastrointestinal interface. These novel insights demonstrate an interesting relationship between diet, gut microbiota, and host cholesterol metabolism.

A Experimental Study published in 2019 in the journal Nature Communications found that Pu-erh tea was found to lower triglyceride and total cholesterol levels more significantly than green, oolong, or black teas. Comparative studies using rodents treated with Pu-erh tea, green tea, and black tea provided supporting evidence that fully fermented Pu-erh tea is more effective in causing hypolipidemic and hypocholesterolemic effects compared to other partially fermented and non-fermented teas.

A Review Article published in 2019 in the journal Nutrition Reviews found that Oats improve gastrointestinal health, reduce cholesterol, and regulate satiety, with effects on the gut microbiome constituting an appealing new research area. The researchers undertook a comprehensive literature review using predefined search criteria and keywords related to gastrointestinal health outcomes in the PubMed database. They sought to explore the impact of oats on gastrointestinal health in humans, with the intent to identify both human and animal studies, as well as in vitro studies, that met their specific inclusion criteria. They extracted data from eight human studies, nineteen animal trials, and five in vitro studies for this synthesis. The results underscore that oats, due to their unique composition of bioactive compounds, lipids, and β-glucan, have beneficial effects on gastrointestinal health. The human studies showed consistent beneficial outcomes, with complementary evidence from animal and in vitro studies. The degree of effect, however, appeared to vary depending on the type of oats and dosage used. For instance, oat types providing between 2.5 to 2.9 grams of β-glucan a day were found to decrease fecal pH and alter fecal bacteria, while 40 to 100 grams per day of oat bran was shown to boost bacterial mass and short-chain fatty acids in human feces. The researchers note that different study designs, methodologies, and types of oats used make comparing results challenging.

A Experimental Study published in 2018 in the journal Molecular Nutrition & Food Research found that Dietary supplementation with Goji berries enhances Bifidobacteria and butyrate-producing bacteria growth, resulting in potential preventative effects against colitis. In this study, two groups of IL-10-deficient mice were used, with one group kept on a standard rodent diet and the other supplemented with a Goji berry diet, accounting for 1% of the dry feed's weight. These diets were maintained for 10 weeks. Colonic tissues and fecal contents were collected and analysed after this period. In the Goji supplemented group, there was a noticeable decrease in colonic pathobiological scores, a reduced mRNA expression of Il17a and Tgfb1, and an increase in Muc1 expression and fecal IgA content. Goji supplementation was found to increase the Actinobacteria phylum, leading to a surge in Bifidobacteria in the gut microbiota. Dietary Goji also promoted the growth of butyrate-producing bacteria like the Lachnospiraceae-Ruminococcaceae family and Roseburia species under Clostridium cluster XIVa, with Clostridium leptum and Fecalibacterium prazusnitzii significantly increased in the Goji group. Interestingly, the gene encoding butyryl-coenzyme A CoA transferase, crucial for butyrate synthesis in these bacteria, showed a sixfold increase in the fecal samples from the Goji group, correlating with higher fecal butyrate levels. This phenomenon indicates that Goji berry's dietary inclusion results in Bifidobacteria proliferation and the butyrate-producing bacteria's blooming, which may have cross-feeding relationships providing preventative effects against colitis.

A Randomised Controlled Trial published in 2018 in the journal Nutrients found that Consuming two SunGold kiwifruits daily over 12 weeks improved vitamin C status, reduced blood pressure, waist measurements and altered faecal microbiota composition in prediabetic individuals. Over a 12 week pilot intervention trial, people with prediabetes were observed after consuming two SunGold kiwifruits per day. Participants filled out a physical activity questionnaire and a three-day estimated food diary at both the commencement and end of the trial. Venous blood samples were collected at the start, in between (at 6 weeks) and at the end of the trial, to observe glycaemic indices, plasma vitamin C concentrations, hormones, lipid profiles and high-sensitivity C-reactive protein levels. Additionally, participants provided faecal samples at each visit for DNA extraction and subsequent amplification and sequencing of a region of the 16S ribosomal RNA gene to determine faecal microbiota composition. The differences were then compared between week 12 and their baseline measurements revealing a significant increase in plasma vitamin C concentration. Further changes including significant reductions in both diastolic and systolic blood pressure as well as waist circumference and waist-to-hip ratio were recorded. Despite recording a slight drop in HbA1c levels and a minor increase in fasting glucose, the changes were small and not clinically significant. Moreover, the composition analysis of the faecal microbiota indicated an increase in the relative abundance of hitherto uncultivated, hence uncharacterised members of a particular bacterial family. These findings suggest that these unknown bacterial members could potentially have a functional relationship with the polysaccharides and polyphenols in kiwifruits.

A Review Article published in 2017 in the journal Critical Reviews in Food Science and Nutrition found that Kiwifruits can relieve constipation and irritable bowel syndrome, potentially through protease-activated signaling, modulation of microflora, changes in colonic methane, bile flux, or mediation of inflammatory processes. The review outlines the physiological processes underlying constipation and irritable bowel syndrome, and discusses the nutritional composition of kiwifruits. It delves into recent advances made in the study of kiwifruits and their impact on abdominal comfort, with the focus being given to the effect of kiwifruit fibers on gastrointestinal health. The study also identified and examined certain gaps in the existing research, using indications from studies on other foods known to affect the gastrointestinal tract to derive possible mechanisms of kiwifruits' beneficial actions. In discussing the results, the review observed that while the effect of kiwifruit fibers on gastrointestinal health is well established, the supposed increase in gastrointestinal motility caused by kiwifruits is yet to be fully characterized. Numerous potential mechanisms were invoked that could be contributing to the physiological effects observed - these included the induction of motility through protease-activated signaling, the modulation of microflora in the gut, alterations in colonic methane status or bile flux, and the mediation of inflammation within the gut.

A Review Article published in 2017 in the journal Trends in Food Science & Technology found that The claimed health benefits of coix include anti-oxidation, anti-cancer, anti-inflammation, anti-allergy, enhancing immunological activity, regulating endocrine functions, anti-obesity, anti-diabetes, gastroprotection, hypolipidemia, and modulating gut microbiota. Coix seeds contain a range of bioactive components including polysaccharides, proteins, lipids, polyphenols, phytosterols, carotenoids, spiroenone and lactams. The chemical constituents of coix contribute to a range of medical and nutritional benefits. These claimed health benefits include anti-oxidation, anti-cancer, anti-inflammation, anti-allergy, enhancing immunological activity, regulating endocrine functions, anti-obesity, anti-diabetes, gastroprotection, hypolipidemia, and modulating gut microbiota. The bioactivity of coix depends on the varieties as well as the sample preparation methods such as the solvent type. Coix seed is rich in starch and has similar processing properties of other cereals for food formulation. Coix can be further developed as a healthy grain for human consumption.

A Randomised Controlled Trial published in 2017 in the journal Journal of Nutritional Science found that Gold kiwifruit supplementation increases the abundance of the beneficial gut bacterium Faecalibacterium, which could potentially enhance gut microbiota composition and reduce inflammation. This research was conducted on two groups of participants: one healthy and the other suffering from Functional Constipation (FC). The groups, one containing 20 individuals (one of whom did not complete the study) and the other 9, were given ACTAZIN™ green (in doses of 2400mg and 600mg) and Livaux™ (2400 mg) gold kiwifruit supplements, as well as a placebo in the form of isomalt. The study design was a randomized cross-over structure carried out over 4 weeks, with 2 weeks washout periods between each stage. Changes in faecal microbiota composition and metabolism were assessed using 16S RNA gene sequencing and Gas Chromatography (GC), and colonic pH was measured via SmartPill wireless motility capsules. The baseline measurements showed that the composition of the faecal microbiota differed significantly between the two groups, with certain bacterial taxa such as Bacteroidales markedly more abundant in the healthy group, while others, including Ruminococcaceae, were more prevalent in the FC group. The clearest change affected by the nutrient supplementation was an increase in Faecalibacterium abundance in the FC group following Livaux™ supplementation, a result observed in nearly all participants in this group. As lower proportions of Faecalibacterium are often linked with gastrointestinal disorders, this increase suggests that the supplements could offer a strategy for ameliorating these conditions.

A Experimental Study published in 2016 in the journal PLOS One found that Pu-erh tea's fermentation process alters its microbial community, with aging significantly impacting raw but not ripened Pu-erh, and toxic metabolites present support brewing customs. The researchers looked into the microbial communities inherent in Pu-erh tea, a special blend originating from Yunnan, China. The fresh leaves of the tea plant, Camellia sinensis, undergo two types of fermentation- the traditional raw fermentation and the faster, ripened variant. Using high-throughput rDNA-amplicon sequencing, a method to identify and quantify various bacteria and fungi present, they examined both the leaves and both types of Pu-erh tea. The study also explored possible mycotoxins in the tea profiles through quantitative liquid chromatography-tandem mass spectrometry, a technique used to detect and quantify various substances. Despite observing significant alterations in the fungal and bacterial compositions due to both fermentation processes, the researchers found the aging process to produce noteworthy changes in raw Pu-erh but not in the ripened type. They identified 390 fungal operational taxonomic units (OTUs) and 629 bacterial OTUs in the leaves and teas. Interestingly, despite the difference in the speed and nature of the fermentation processes, ripened and well-aged raw Pu-erh teas exhibited similar microbial communities alien from those observed in young, raw Ph-erh tea. They also found 25 toxic metabolites, primarily of fungal origin, with the most common being patulin and asperglaucide. These facts lend credibility to the Chinese custom of discarding the first preparation of the Pu-erh tea and using the damp tea for subsequent brewing.

A published in 2012 in the journal Scientific Reports found that The traditional Chinese medicine diagnosis of Cold and Hot Syndromes based on tongue-coating appearance successfully detects signals in the tongue-coating microbiomes that are indicators of the entire body's status. In summary, by studying the tongue-coating microbiomes of chronic atrophic gastritis patients and healthy controls using next-generation sequencing and bioinformatics analysis, we revealed the possible mechanism underlying the traditional tongue diagnosis and highlighted the potential for using tongue coating microbiome features as biomarkers to reflect the holistic status of the human body, especially in gastrointestinal diseases. The current sample size of this study is still small and further investigations with more samples and complete metagenome sequencing are needed for a comprehensive understanding of the system. The observations described here might provide a new direction for understanding the biological basis of TCM tongue diagnosis and the link between the “geographic tongue” and the human body's health status observed in modern Western medicine.

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