from Wine Spectator

They looked at 11 all-cause dementia (ACD) studies with 73,330 participants, five Alzheimer’s dementia studies with 52,715 participants and four vascular dementia studies with 49,535 participants. They used a random-effect model to analyze the data.

The main conclusion of the study supports the idea that light to moderate alcohol consumption—one drink per day or less, according to this analysis—confers a lower risk of all-cause dementia than total abstinence. On the other hand, the researchers found that the risk for dementia was higher for those who consume more than three to four drinks per day, or 23 drinks per week.