A wonderful warm cup of morning coffee can also have its health benefits. Caffeine in coffee stimulates the brain and nervous system, and may lower risk of diabetes, Parkinson's disease, mood problems, headaches and even cavities.
Some scientists say coffee has many beneficial substances, including chlorogenic acid, a compound in the antioxidant family that may improve sugar metabolism. Another perk is that coffee contains magnesium, a mineral that can also improve insulin sensitivity and enhance glucose tolerance -- thumbs up for preventing diabetes.