Insights & Discussion
Tremella fuciformis, as a nutritional supplement, safely improved subjective memory complaints and cognitive functions in individuals suffering from subjective cognitive impairment.
Seventy-five individuals with subjective cognitive impairment were included in an 8-week, double-blind, randomized, placebo-controlled trial. Participants received either Tremella fuciformis (300mg/day or 600mg/day) or a placebo. The key point of assessment was fluctuations in questionnaire scores evaluating subjective memory complaints. Secondary measures involved changes in short-term memory and executive function performances, assessed using standardized cognitive tests. Effects on grey matter volume were examined using voxel-based morphometry.
The Tremella fuciformis group showed significant improvements in total questionnaire scores related to subjective memory complaints compared to the placebo group. Alongside this, substantial improvements were recorded in short-term memory and executive functions within the same group. Factors such as left precuneus, right supramarginal gyrus, right middle frontal gyrus, and right postcentral gyrus revealed significant group-to-visit interactions with no notable increase in adverse events among both high dose and low dose Tremella fuciformis groups, and the placebo group. These findings emphasize the potential of Tremella fuciformis as a safe nutritional supplement to alleviate subjective memory complaints and boost cognitive functions in individuals with subjective cognitive impairment.
Discover Related Insights
Honey exhibits multifaceted benefits for brain health, acting as a memory booster, neuroprotective agent, anti-stress, and anti-nociceptive substance, fostering potential therapeutic applications to enhance overall cognitive well-being.
2023 Frontiers in Aging Neuroscience Honey on brain health: A promising brain booster Zamri NA, Ghani N, Ismail CAN, Zakaria R, Shafin N
Review Article Brain Health Cognitive Function Honey
This review scrutinizes 34 original articles exploring the impact of honey on brain health. Honey, traditionally known as a natural sweetener, emerges as a versatile substance with applications in nutrition, health supplementation, and brain health enhancement. The analysis identifies four key benefits: memory enhancement, neuroprotection, stress reduction, and pain alleviation. The review emphasizes the growing interest in understanding the mechanisms that underlie these effects, paving the way for potential therapeutic roles of honey in promoting cognitive well-being.
The literature review underscores the significant role of honey in brain health research, shedding light on its diverse benefits, including memory improvement, neuroprotection, stress mitigation, and pain relief. The emphasis on unraveling the underlying mechanisms reflects a broader interest in establishing honey's therapeutic potential for enhancing overall brain health. This comprehensive exploration of honey's effects on cognition opens avenues for developing novel therapeutic strategies harnessing honey's natural properties.
Regular walnut consumption is consistently linked to improved cognitive performance in adults, particularly those at higher risk of cognitive decline.
2020 Advances in Nutrition Nut Consumption for Cognitive Performance: A Systematic Review Lauren E Theodore, Nicole J Kellow, Emily A McNeil, Evangeline O Close, Eliza G Coad, Barbara R Cardoso, et al.
Systematic Review Cognitive Function Memory Walnut
The methodology of this review involved a systematic search of four different databases - Ovid MEDLINE, Scopus, CINAHL Plus, and Embase, from their inception through to April 2020. The search aimed to identify both interventional and observational studies that investigated the effect of nut intake on cognitive outcomes in adults aged 18 and above. The specific nuts studied included almonds, hazelnuts, macadamias, pistachios, walnuts, pecans, pine nuts, Brazil nuts, cashews, and peanuts. The review then selected the most relevant studies for further analysis; out of 2,374 identified articles, 22 met the criteria, with a combined participant count of 43,793.
The resulting discussion of this review's findings highlighted that, despite inconsistencies due to varying study designs and types of nuts studied, regular mixed nut intake could potentially protect cognitive function in different age groups. However, more notable was the recurrent evidence found in studies focusing on groups at a higher risk of cognitive impairment, which repeatedly reported improved outcomes. Particularly, studies specifically targeting walnut consumption consistently found it positively associated with enhanced cognitive performance. The review found homogeneous results within these walnut-centred studies, with only one out of six, including two randomized controlled trials, not reporting a positive association.
Daily consumption of decaffeinated green tea catechins may enhance working memory.
2020 Molecules Effect of Daily Intake of Green Tea Catechins on Cognitive Function in Middle-Aged and Older Subjects: A Randomized, Placebo-Controlled Study Baba Y, Inagaki S, Nakagawa S, Kaneko T, Kobayashi M, Takihara T
Randomised Controlled Trial Cognitive Function Green Tea Green Tea Catechin
The study incorporated a double-blind, randomized, controlled approach to determine the effects of 336.4 mg of decaffeinated green tea catechins on cognitive function. It targeted Japanese adults, aged 50 to 69 years, exhibiting a Mini-Mental State Examination Japanese version score of over 24 and who self-identified as having cognitive decline. The experiment comprised administering a substance and then examining the cognitive function post a single dosage as well as following 12 weeks of everyday consumption. The Cognitrax testing battery was utilized to assess cognitive function.
In the results, it was observed that the incorrect response rate on the Continuous Performance Test significantly fell after a single dosage of green tea catechins. After 12 weeks of regular intake, the response duration for the two-back test in Part 4 of the 4-part Continuous Performance Test reduced, indicating potential improvement in working memory. The data suggests that consuming green tea catechins daily may potentially lead to cognitive enhancements, particularly in working memory.
Blueberries and their products may improve certain measures of cognitive performance, particularly memory, and positively affect mood.
2020 Brain, Behavior, and Immunity The effect of blueberry interventions on cognitive performance and mood: A systematic review of randomized controlled trials Travica N, D'Cunha NM, Naumovski N, Kent K, Mellor DD, Firth J, et al.
Systematic Review Blueberry Cognitive Function Memory
The systematic review process involved evaluating the results from randomized controlled trials that investigated the effects of blueberries and blueberry products on cognitive performance and mood. A total of eleven articles, encompassing twelve studies, were examined. The studies employed various forms of blueberries - freeze-dried, whole, and concentrate. Different demographic groups were considered across the studies: children, young adults, and older people with or without known cognitive impairment. The studies considered the impact of consumed or supplemented blueberries, varied in dosage and duration, on cognitive performance, specifically in relation to both short-term and long-term memory, as well as spatial memory. Also, the studies investigated the effects on mood, particularly the potential enhancement of positive feelings.
The findings revealed that eight out of twelve studies reported an improvement in cognitive performance following the ingestion of blueberries, although variations in each specific study's design, dosage, and anthocyanin content made cross-study comparisons challenging. Regarding mood, out of five studies, only one study reported a significant improvement in mood upon consumption of blueberry products, while the others reported no significant change. Despite differences, all studies featured a low risk of bias overall, underscoring the perceived validity of these findings.
The consumption of epicatechin, plentiful in foods like cocoa, positively influences memory, executive function, and processing speed, particularly in older adults.
2018 Nutrients The Impact of Epicatechin on Human Cognition: The Role of Cerebral Blood Flow Haskell-Ramsay C, Schmitt J, Actis-Goretta L
Cerebral Blood Flow Cocoa Cognitive Function
Methodology:
The research design for this paper was anchored on the use of intervention studies. These are intensive studies purposed to test breakthrough methodologies or practices on a select group of participants. In this case, the intervention was the ingestion of epicatechin, a compound found largely in cocoa. The subjects monitored were mostly from a more mature demographic, aged 50 years and above. The studies selected for review were those that lasted a minimum of 28 days to ensure an adequate examination period and only those which had a daily epicatechin dose exceeding 50 mg.
Discussion of Results:
The paper notes an appreciable improvement in the cognitive performance in those subjects who consumed diets high in epicatechin. More specifically, there was an enhancement in memory, executive function, and processing speed. Trends showed that these benefits were more conspicuous in studies which offered more than 50 mg of epicatechin daily, and ran for at least 28 days. The results were particularly noteworthy in the elderly population, where all participants showed cognitive improvement. The impact of epicatechin on cerebral blood flow, however, could not be definitively proved and the results suggest its role requires further exploration. Additionally, the synergistic effects of epicatechin with other dietary elements also complicated the ability to attribute the cognitive improvement to this compound alone.
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