A Drink a Day May Keep Alzheimer's Away Fran Lowry August 26, 2011 — Light to moderate drinking seems to reduce the risk for dementia and cognitive decline, according to a new study published in the August issue of Neuropsychiatric Disease and Treatment. A meta-analysis of 143 studies on the effects of alcohol on the brain showed that moderate drinking, defined as no more than 2 drinks a day for a man and no more than 1 drink a day for a woman, reduced the risk for Alzheimer's disease and other forms of dementia by 23%. "It doesn't seem...