According to Oxford researchers working with colleagues in Norway, chocolate, wine and tea enhance cognitive performance.The article goes on to caution of course that it's moderate alcohol consumption that's associated with improved cognitive function — the sort of cognitive function involved in noticing that "chocolate, wine, and tea" are out of alphabetical order or that there's something amusing about the series "Physiology, Anatomy and Genetics and Norway."
The team from Oxford's Department of Physiology, Anatomy and Genetics and Norway examined the relation between cognitive performance and the intake of three common foodstuffs that contain flavonoids (chocolate, wine, and tea) in 2,031 older people (aged between 70 and 74).
Participants filled in information about their habitual food intake and underwent a battery of cognitive tests. Those who consumed chocolate, wine, or tea had significantly better mean test scores and lower prevalence of poor cognitive performance than those who did not. The team reported their findings in the Journal of Nutrition.
Chocolate, Wine And Tea Improve Brain Performance (Science Daily, via Lifehacker)