Blood sugar

Your blood sugar can rise after you have coffee -- even black coffee with no calories -- thanks to the caffeine. The same goes for black tea, green tea, and energy drinks. Each person with diabetes reacts to foods and drinks differently, so it's best to keep track of your own responses.
--- "Science shows that if you eat the constituents of a meal in a specific order, you can reduce the glucose spike of the meal by 75%," says Inchauspe. "So you're eating the exact same food, but there are much fewer consequences on your body." The ideal order is as follows: Vegetables first, protein and fats second, starches and sugars last. -- mindbodygreen.com