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. 2014 Sep 29;6(10):4032-42.
doi: 10.3390/nu6104032.

Green tea consumption affects cognitive dysfunction in the elderly: a pilot study

Kazuki Ide  1 , Hiroshi Yamada  2 , Norikata Takuma  3 , Mijong Park  4 , Noriko Wakamiya  5 , Junpei Nakase  6 , Yuuichi Ukawa  7 , Yuko M Sagesaka  8
Affiliations

Green tea consumption affects cognitive dysfunction in the elderly: a pilot study

Kazuki Ide et al. Nutrients. .

Abstract

Green tea is known to have various health benefits for humans. However, the effect of green tea consumption on cognitive dysfunction remains to be clinically verified. We conducted a clinical study to investigate the effects of green tea consumption on cognitive dysfunction. Twelve elderly nursing home residents with cognitive dysfunction (Mini-Mental State Examination Japanese version (MMSE-J) score: <28) participated in the study (2 men, 10 women; mean age, 88 years). The participants consumed green tea powder 2 g/day for 3 months. After three months of green tea consumption, the participants' MMSE-J scores were significantly improved (before, 15.3 ± 7.7; after, 17.0 ± 8.2; p = 0.03). This result suggests that green tea consumption may be effective in improving cognitive function or reducing the progression of cognitive dysfunction; however, long-term large-scale controlled studies are needed to further clarify the effect.

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