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.
Gretchenâs testing shows that for her âcaffeine does seem to have an effect.â But while her blood glucose level rose by 15 points, that was because of the carbs she ate. The caffeine just delayed the peaks and didnât seem to increase them. Get up and have caffeine or no caffeine. Wait an hour. Eat breakfast.