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Eating sardines twice a week for a year significantly reduces the risk of developing type 2 diabetes in prediabetic individuals aged 65 and above.
In this study, 152 individuals with prediabetes and age 65 or older were chosen from three primary care centers in Barcelona. These subjects had a fasting glucose of 100-124 mg/dL. They were divided into two intervention groups: a control group (CG) and a sardine group (SG). While both groups were given the same nutritional diet to prevent type 2 diabetes for a year, the sardine group was instructed to include 200 grams of sardines in their diet every week. Data including fasting glucose levels, type of diet followed, and other demographic variables were collected before starting and after ending the diet.
After a year, the sardine group, when compared to the control group, showed significant reductions in the percentage of individuals classified as very high risk for developing type 2 diabetes. The sardine group also showed improved health parameters such as increased HDL-cholesterol and adiponectin levels, decreased triglyceride levels, and slightly reduced blood pressure. Additionally, the consumption of sardine nutrients - omega-3, EPA and DHA, vitamin D, fluorine, and taurine - was significantly higher in the sardine group. Further, changes in erythrocyte membrane fatty acids were detected only in the sardine group, which included a decrease in 5 omega-6 fatty acids and an increase in 3 omega-3 fatty acid types.
A one-year, sardine-enriched diet in an elderly population with pre-diabetes exerts a greater protective effect against developing type 2 diabetes and cardiovascular events.
Following the nutrition intervention, 29.6% of SG subjects had left the "very high" risk group (from 37.3% to 7.7%), while only 4.9% of CG subjects had managed to do so (from 27.3% to 22.4%), a finding which is significantly different.
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Omega-3 fatty acids found in selected fish oils, particularly smoked eel, effectively managed dyslipidemia and reduced cardiovascular disease risk factors.
2021 Journal of Medicinal Food Influence of Omega-3 Fatty Acid-Rich Fish Oils on Hyperlipidemia: Effect of Eel, Sardine, Trout, and Cod Oils on Hyperlipidemic Mice Kontostathi M, Isou S, Mostratos D, Vasdekis V, Demertzis N, Kourounakis A, et al.
Animal Study Sardine Trout
The study began by inducing dyslipidemia through a high fat diet in a mouse model. After 30 days of this diet, all animals displayed hyperlipidemia. Subsequently, the diet was switched to consist of 90% standard rodent chow and 10% oil derived from different fish varieties (eel, sardine, cod liver, trout). This diet was maintained for the next 60 days. Blood glucose, total blood cholesterol, triglycerides, and high-density lipoprotein were quantified at the end of the study period. Additionally, the fish oils' omega-3 and omega-6 fatty acid percentages and ratio were taken into account by using gas chromatography.
The results showed that incorporating fish oils in the diet considerably improved the hyperlipidemic state triggered by the high-fat diet. Specifically, eel and cod liver oil diets led to significant decreases in triglycerides. Meanwhile, all diets, apart from the standard rodent chow and sardine, resulted in noticeable decreases in blood glucose. Interestingly, smoked eel stood out as the best source for omega-3 fatty acids due to its optimal balance of omega-6 fatty acids, excellently alleviating the mixed hyperlipidemia induced by the high-fat diet.
Green tea, coffee, wine, and curry have beneficial health effects due to the polyphenols they contain, which possess both antioxidant and pro-oxidant properties.
2021 Molecules The Beneficial Effects of Principal Polyphenols from Green Tea, Coffee, Wine, and Curry on Obesity Ohishi T, Fukutomi R, Shoji Y, Goto S, Isemura M
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The research leverages epidemiological studies, clinical trials, cell-based studies and animal tests to examine the effects of green tea, coffee, wine, and curry -- and their key polyphenols -- on human health. The polyphenols investigated include epigallocatechin gallate in green tea, chlorogenic acid in coffee, resveratrol in wine, and curcumin in curry. The study concentrates on the workings of these polyphenols, primarily focusing on reactive oxygen species (ROS), and how they perform both anti- and pro-oxidant functions, fundamentally influencing different enzymes and factors with health contributions.
In the discussion of the results, it is mentioned that the anti-oxidative actions of these polyphenols assist in the scavenging of ROS and the downregulation of the nuclear factor-κB, yielding beneficial anti-inflammatory effects. Conversely, their pro-oxidant actions appear to elevate ROS production, encouraging the activation of 5'-AMP-activated protein kinase that regulates different enzymes and factors for health improvement. However, the exact mechanism of how these polyphenols exhibit either pro- or anti-oxidant effects remains unclear. Also, the research underscores that while many studies note their health benefits, some others show no positive effects on health conditions such as obesity, suggesting that outcomes could be influenced by various study factors.
Seasonal variations influence the nutrient composition of European sardines, with lipid levels peaking from July to September and amino acid content highest during winter.
2020 Foods Seasonal Changes in Free Amino Acid and Fatty Acid Compositions of Sardines, Sardina pilchardus (Walbaum, 1792): Implications for Nutrition Šimat V, Hamed I, Petričević S, Bogdanović T
Network Pharmacology Omega-3 Fatty Acids Sardine
The methodology consisted of analyzing the proximate composition of European sardines from the Adriatic Sea over a period of one year. The nutritional profiles, focusing on free amino acid and fatty acid, were quantified monthly to discern any seasonal variations. The study paid special attention to quantities of bioactive lipids such as omega-3 fatty acids, and essential amino acids, as these are crucial for determining the nourishing value of the sardines for both industrial processing and for health benefits to consumers.
The findings revealed that the nutritional content in sardines displays seasonal variation. The lipid content topped out from July to September, whereas the highest total amino acid content occurred during the winter, from January to March, with histidine, arginine, and threonine being most present. Interestingly, the study noted significant quantities of essential free amino acids throughout the year, with particular surges in March and dips in May. The fatty acid profile predominantly consisted of omega-3 fatty acids, with sardines showcasing high concentrations of eicosapentaenoic and docosahexaenoic acids, which were especially abundant from July to September.
Omega-3 polyunsaturated fatty acids supplementation during the prenatal and perinatal period could have a protective effect on neurodevelopmental disorders including ADHD, ASD, and MDD in youth.
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The research implemented supplementation of omega-3 polyunsaturated fatty acids also known as Omega-3 PUFAs, in different quantities and durations to youth with attention deficit hyperactivity disorder (ADHD), major depressive disorder (MDD) and autism spectrum disorder (ASD). This was carried out based on suggested dosage and duration from various randomized controlled trials and systemic literature reviews. It was observed that omega-3 PUFAs were essential nutrients not just for physical health but also for mental health, more so during the prenatal and perinatal stages of development.
The results demonstrated that clinical symptoms improved in youth with ADHD, MDD and ASD after they were supplemented with Omega-3 PUFAs, especially in cases where there was high inflammation or low baseline Omega-3 index present. The research showed very promising evidence that Omega-3 PUFAs had positive effects on lethargy and hyperactivity symptoms in ASD. There was also an inclination that Omega-3 PUFAs levels and inflammation could be potential markers for treatment response in ADHD and MDD.
Avocado's nutritional and therapeutic properties show potential for novel drug discovery in prevention and treatment of prevalent diseases such as cancer, diabetes, and cardiovascular issues.
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The discussion of results involved highlighting the potential of avocado in novel drug discovery for the prevention and treatment of a variety of diseases like cancer, microbial, inflammatory, diabetes, and cardiovascular diseases. Emanating from the unique bioactive compounds and antioxidant contents of avocado, it’s clear that the fruit has much more to offer in terms of medicinal value than is currently explored today.
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