It May Prevent Diabetes
Coffee contains minerals such as magnesium and chromium, which help the body use the hormone insulin. Why is this important? Insulin controls blood sugar (otherwise known as glucose). In type 2 diabetes, the body loses its ability to use insulin and regulate blood sugar effectively. More than 15 published studies have found that coffee drinkers (about 2 cups daily) tend to be around 35% less likely to have type 2 diabetes. The findings held regardless of sex, weight, or geographic location.
There’s also evidence that decaffeinated coffee may have the same benefit as regular coffee.