Coffee has lots of antioxidants, including chlorogenic acid and magnesium (which can improve sensitivity to insulin), and was found to be better than decaffeinated coffee, though decaf also had some positive effects. In 2009, a study published in the Archives of Internal Medicine reported that people who drank the most coffee seemed to have the lowest risk of developing type 2 diabetes. With each cup of coffee consumed daily, the risk of type 2 diabetes dropped by 7%.

The Bottom Line Scientifically

Evidence published over the last five years consistently links regular, moderate coffee consumption with a reduced risk of developing type 2 diabetes. The association is documented in several different populations and shows a consistent dose response, i.e. lower risk at higher consumption levels.

Drinking 3 to 4 cups of coffee per day is associated with an approximate 25% lower risk of developing type 2 diabetes compared to consuming none or less than 2 cups per day.

Every additional cup of coffee up to 6-8 cups /day (regular or decaffeinated) is associated with a 5-10% lower risk of developing type 2 diabetes.

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