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Randomized Controlled Trial
. 2020 Nov 26;12(12):3639.
doi: 10.3390/nu12123639.

Effects of Matcha Green Tea Powder on Cognitive Functions of Community-Dwelling Elderly Individuals

Keisuke Sakurai  1 , Chutong Shen  1 , Yuri Ezaki  1 , Noriko Inamura  2   3 , Yoichi Fukushima  4 , Nobutaka Masuoka  1 , Tatsuhiro Hisatsune  1
Affiliations
Randomized Controlled Trial

Effects of Matcha Green Tea Powder on Cognitive Functions of Community-Dwelling Elderly Individuals

Keisuke Sakurai et al. Nutrients. .

Abstract

Matcha Green Tea Powder contains a variety of active ingredients beneficial to health, such as tea catechins, lutein and vitamin K. It is also known that these ingredients confer benefits upon cognitive functions of elderly people. Therefore, we aimed to investigate the relationship between a daily supplementation of Matcha and the change in cognitive functions of community-dwelling elderly people. A randomized, double-blind, placebo-controlled 12-week trial was performed. Sixty-one participants were recruited and randomly assigned to receive test drink containing 3g powder from fresh Matcha or placebo powder per day. Changes in cognitive function were assessed utilizing a psychometric test battery. Daily food intake was assessed by a Brief-type Self-administered Diet History Questionnaire (BDHQ). In the gender-specific analysis, a significant cognitive enhancement was observed in the Montreal Cognitive Assessment (MoCA) score in the active group of women. In dietary analysis, we found a significant inverse correlation between consumption of vitamin K in daily diet, excluding test drinks, and change in MoCA. The present study suggests that daily supplementation of Matcha Green Tea Powder has protective effects against cognitive decline in community-dwelling elderly women.

Keywords: aging; cognitive function; green tea; impulsivity; memory function; vitamin K.

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Conflict of interest statement

The authors declare no conflict of interest.

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