Science Daily News reports that moderate alcohol consumption in seniors can improve memory for events. Light drinkers had a larger hippocampus. The hippocampus is a part of the brain that goes downhill in early-stage Alzheimer's disease.
This connects to another study reported this week showing that flavonols in chocolate and cocoa can reverse memory decline by affecting a different area, the dentate gyrus in the brain. This reversal of age-related memory decline is different from the episode memory discussed above. "A cup of cocoa, then bed, keeps you smart in the head".