Drinking coffee is good for a diet - but how many cups should you drink a day? Four cups of coffee (without milk or sweeteners) per day can lower body fat by about 4%. "Coffee contains caffeine, which has thermogenic effects and can speed up metabolism, helping you burn more calories," said the dietitians.
"If you add cream, whole milk or sugar to the coffee, you can easily offset each of the calories you burn from the coffee," they explained.