1 OPINION. 2  The screening process for Syrian refugees is much more rigorous than for other visitors coming to the U.S. (AP Photo/Hassan Ammar)
About 250 milligrams of caffeine â or the equivalent of 2 to 2 1/2 cups (473 to 591 milliliters) of plain, brewed coffee â a day may cause this effect. If you have type 2 diabetes and you're struggling to control your blood sugar levels, limiting the amount of caffeine in your diet may provide a benefit.
Blood pressure: Drinking coffeeâas much as six cups a dayâdoes not increase blood pressure levels long-term. Blood sugar: The antioxidants in coffee (caffeinated and decaf) aid in blood sugar control, reducing risk for type 2 diabetes. Even drinking a small amount of coffee each day can reduce risk for type 2 diabetes, and drinking as many as six or more cups a day may further reduce risk.