India, April 24 -- Matcha tea is a finely ground powder made from specially grown and processed green tea leaves. It was earlier popular in Japan but is now enjoyed worldwide because of its health benefits. A study published in PLOS ONE has given an insight into matcha green tea's effects on cognitive decline in older adults and revealed some promising results. Here's what was found. Also read | Want to 'shrink waistline'? Doctor advises drinking matcha to lose an inch of your belly

The yearlong study of older adults with cognitive decline in Japan found that drinking matcha green tea improved participants' emotional perception and sleep quality. The study included Japanese older adults between 60 and 85 years of age.

Matcha is rich in ...