People who regularly drink green tea may have a lesser risk of mental health decline as they get older, new research has revealed.
Studies on over 1,000 Japanese adults aged 70 and over showed that the more green tea that men and women drank the lesser chance of cognitive decline was recorded, reports American Journal of Clinical Nutrition.
Scientists have discovered that certain compounds in the tea may protect brain cells from the damaging processes that are associated with conditions such as Alzheimer's and Parkinson's disease.
Results reveal that older people who drank two or more cups of green tea per day were half as likely to suffer from cognitive impairment that those who drink three cups or less a week.
This evidence seems to explain why green tea-drinking countries such as Japan have a lower rate of dementia compared with Europe and North America.
Researchers concluded that any benefit from drinking green tea could have a "considerable" impact on public health.