http://www.eurekalert.org/pub_releases/2009-07/wfub-rma071309.php
Regular moderate alcohol intake has cognitive benefits in older adults:
Researchers found that individuals who had no cognitive impairment at the start of the study and drank eight to 14 alcoholic beverages per week, or one to two per day, experienced an average 37 percent reduction in risk of developing dementia compared to individuals who did not drink at all and were classified as abstainers. The type of alcohol consumed did not matter.