Healthy and Beautiful Corner

For the first time, research has examined the association between green tea consumption and cognitive function in humans.

This is a Japanese research published in the American Journal of Clinical Nutrition involving 1000 participants aged 70 and older. Green tea is a popular drink in Japan, over 10% of the population reporting taking at least two cups daily. The participants passed tests including mental skills memory, orientation, ability to follow instructions and attention.

Green Tea

People drinking green tea were less likely to exhibit cognitive deficits according to these tests. Those who reported drinking 2 cups or more per day were 54% less likely than those who took up to 3 times a week, while those who took 4-6 times a week were 38% less likely.

Coffee, black tea and oolong tea were not associated with fewer cognitive deficits.

This research does not prove that the best cognitive skills are due to green tea. The researchers also took into account other factors that may be connected such as diabetes, smoking, advanced age, physical activity, social ties, consumption of fish and vegetables and general health. Even adjusting the mathematical analysis to account for these factors, a high consumption of green tea was always associated with a lower risk of cognitive deficits.

It remains that other factors could explain the link between green tea consumption and decreased risk of cognitive deficits. For example, Japanese socialize and relax over tea, which may be beneficial for the brain. Otherwise healthy people may be more likely to drink green tea.

The present study nevertheless indicates the importance of pursuing further studies to test a possible causal link. A compound in green tea has shown early promise in experiments on brain diseases in animals.

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