All three can supply us with energy in the form of calories although protein prefers not to be used for that role. Supplying energy is the main job of carbohydrates and fats. Protein's purpose is for body building and repair. Over the next three days we will cover the basic nutrition facts about each of these macronutrients. Your muscles and brain require glucose for energy.
Muscles can store excess glucose as glycogen and can burn fat.
However, your brain depends exclusively on a steady supply of glucose from the blood. Other simple sugars include brown sugar, molasses, corn syrup, and maple syrup. Simple sugars are easily converted to blood glucose in the liver and can enter the bloodstream very soon after being eaten. This can lead to a rapid rise in your blood sugar level, giving you a quick burst of energy and a quick lift in your mood. If blood sugar levels rise too high your body reacts to clear out the excess by secreting insulin.