A Japanese study links green tea to lowered risk for dementia.

While coffee and black tea are popular with people, it is green tea that has been linked to lower risk for dementia in a new study. The study is reported in Medscape Medical News.

The information was presented at the 2015 International Conference on Alzheimer's and Parkinson's Diseases. The conference brings together clinical investigators and scientists each year.

The study tracked 723 participants. The group that drank green tea one to six times a day were deemed to have less mental decline, WebMD reported. 

The study said the only difference between the groups was the amount of green tea consumption: No green tea consumption, 1-6 day consumption and everyday consumption.

Green tea is one of the healthiest beverages around in general and its impact on cognitive function has been reported. There are studies that suggest it can boost memory and brain connectivity, as reported on Medscape.com

In the study "Green Tea's Impact on Cognitive Function Now Visible," Dr. Stefan Borwardt presents that green tea extract can improve memory.

That study indicated green tea improved the connectivity between certain regions of the brain.  

The 2015 International Conference on Alzheimer's and Parkinson's Diseases was held in Nice, France.