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Nutrients 2014, 6(10), 4032-4042; doi:10.3390/nu6104032
Communication

Green Tea Consumption Affects Cognitive Dysfunction in the Elderly: A Pilot Study

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1 Department of Drug Evaluation and Informatics, Graduate School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan 2 White Cross Nursing Home, 2-26-1 Suwa-cho, Higashimurayama, Tokyo 189-0021, Japan 3 Central Research Institute, ITO EN, Ltd., 21 Mekami, Makinohara, Shizuoka 421-0516, Japan
* Author to whom correspondence should be addressed.
Received: 10 May 2014 / Revised: 14 July 2014 / Accepted: 19 September 2014 / Published: 29 September 2014
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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.
Keywords: green tea; oral administration; cognitive function; elderly green tea; oral administration; cognitive function; elderly
This is an open access article distributed under the Creative Commons Attribution License (CC BY 4.0).

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Ide, K.; Yamada, H.; Takuma, N.; Park, M.; Wakamiya, N.; Nakase, J.; Ukawa, Y.; Sagesaka, Y.M. Green Tea Consumption Affects Cognitive Dysfunction in the Elderly: A Pilot Study. Nutrients 2014, 6, 4032-4042.

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