Coffee
If you're trying to kick your java habit you might want to reconsider. A recent Finnish study of 1,400 longtime coffee drinkers reveals that people who sipped between three to five cups of coffee a day in their 40s and 50s reduced their odds of developing Alzheimer's disease by 65 percent compared with those who downed fewer than two cups a day.
Researchers believe that coffee's caffeine and ample antioxidants are the keys to its protective affects.