2024Journal articleFree to read
Uchida K, Meno K, Korenaga T, Liu S, Suzuki H, Baba Y, Tagata C, Araki Y, Tsunemi S, Aso K, Inagaki S, Nakagawa S, and 6 more
PloS one
Objective: Lifestyle habits after middle age significantly impact the maintenance of cognitive function in older adults. Nutritional intake is closely related to lifestyle habits; therefore, nutrition is a pivotal factor in the prevention of dementia in the preclinical stages. Matcha green tea powder (matcha), which contains epigallocatechin gallate, theanine, and caffeine, has beneficial effects on cognitive function and mood. We conducted a randomized, double-blind, placebo-controlled clinical study over 12 months to examine the effect of matcha on cognitive function and sleep quality. Methods: Ninety-nine participants, including 64 with subjective cognitive decline and 35 with mild cognitive impairment were randomized, with 49 receiving 2 g of matcha and 50 receiving a placebo daily. Participants were stratified based on two factors: age at baseline and APOE genotype. Changes in cognitive function and sleep quality were analyzed using a mixed-effects model. Results: Matcha consumption led to significant improvements in social acuity score (difference; -1.39, 95% confidence interval; -2.78, 0.002) (P = 0.028) as evaluated by the perception of facial emotions in cognitive function. The primary outcomes, that is, Montreal Cognitive Assessment and Alzheimer's Disease Cooperative Study Activity of Daily Living scores, showed no significant changes with matcha intervention. Meanwhile, Pittsburgh Sleep Quality Index scores indicated a trend toward improvement with a difference of 0.86 (95% confidence interval; -0.002, 1.71) (P = 0.088) between the groups in changes from baseline to 12 months. Conclusions: The present study suggests regular consumption of matcha could improve emotional perception and sleep quality in older adults with mild cognitive decline. Given the…
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Study type
Randomized controlled trial
People were randomly assigned to matcha or a comparison.
Assigned automatically from the title, abstract and subject terms.
Topics
Matcha is a main subject here (named in the title).
Uchida K, Meno K, Korenaga T, Liu S, Suzuki H, Baba Y, … Arai T. (2024). Effect of matcha green tea on cognitive functions and sleep quality in older adults with cognitive decline: A randomized controlled study over 12 months. PloS one. https://doi.org/10.1371/journal.pone.0309287
DOI: 10.1371/journal.pone.0309287 · PubMed ID: 39213264 · Cited by 25 (OpenAlex)
Japanese matcha is a type of powdered green tea, grown in a traditional way. Shading of the plants during the growth period enhances the processes of synthesis and accumulation of biologically active compounds, including theanine,…
ReviewCognition, mood and stressAntioxidants and polyphenolsL-theanine and caffeineCited 321×Theanine, a major amino acid in green tea, exhibits a stress-reducing effect in mice and humans. Matcha, which is essentially theanine-rich powdered green tea, is abundant in caffeine. Caffeine has a strong antagonistic effect against…
Randomized controlled trialCognition, mood and stressAntioxidants and polyphenolsL-theanine and caffeineCited 84×Background: Green tea is traditionally known to induce mental clarity, cognitive function, physical activation and relaxation. Recently, a special green tea, matcha tea, is rapidly gaining popularity throughout the world and is frequently…
ReviewCognition, mood and stressAntioxidants and polyphenolsL-theanine and caffeineCited 70×Matcha tea is gaining popularity throughout the world in recent years and is frequently referred to as a mood-and-brain food. Previous research has demonstrated that three constituents present in matcha tea, l-theanine, epigallocatechin…
Randomized controlled trialCognition, mood and stressAntioxidants and polyphenolsL-theanine and caffeineCited 66×