Green Tea Consumption and the Risk of Incident Dementia in Elderly Japanese: the Ohsaki Cohort 2006 Study

Don't go down the route of thinking you can shortcut this by taking green tea extract.

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Green Tea Extract Powder
Also called: Camellia sinensis

Dizziness, ringing in the ears, reduced absorption of iron; exacerbates anemia and glaucoma; elevates blood pressure and heart rate; liver damage; possibly death 

And this:

It comes after West Australian man Matthew Whitby spoke to the ABC after losing his liver — most likely as a result of taking a protein powder with green tea extract and a supplement containing garcinia cambogia. 

Green Tea Consumption and the Risk of Incident Dementia in Elderly Japanese: the Ohsaki Cohort 2006 Study

Yasutake TomataPress enter key to Email the author

,

Kemmyo Sugiyama

,

Yu Kaiho

,

Kenji Honkura

,

Takashi Watanabe

,

Shu Zhang

,

Yumi Sugawara

,

Ichiro Tsuji

Division of Epidemiology, Department of Health Informatics and Public Health, Tohoku University School of Public Health, Graduate School of Medicine, Sendai, Japan

Open Access

DOI: http://dx.doi.org/10.1016/j.jagp.2016.07.009

Article Info

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Abstract

Objective

Biological studies have shown that certain components of green tea may have protective effects on neurocognition. However, because of the lack of human epidemiological studies, the impact of green tea consumption on the incidence of dementia has never been confirmed. The objective of this cohort study was to clarify the association between green tea consumption and incident dementia.

Design

A 5.7-year prospective cohort study

Measurements

Using a questionnaire, information on daily green tea consumption and other lifestyle factors was collected from elderly Japanese individuals aged 65 years or more. Data on incident dementia were retrieved from the public Long-term Care Insurance Database.

Results

Among 13,645 participants, the 5.7-year rate of incident dementia was 8.7%. More frequent green tea consumption was associated with a lower risk of incident dementia (HR for ≥5 cups/day vs. <1 cup/day, 0.76; 95% confidence interval: 0.64–0.91). The lower risk of incident dementia was consistent even after selecting participants who did not have subjective memory complaints at the baseline.

Conclusions

Green tea consumption is significantly associated with a lower risk of incident dementia.