What Happens When You Eat Carbohydrates? When you eat foods containing carbohydrates, your digestive system breaks them down into glucose, which enters the bloodstream. Insulin helps move glucose from the blood into cells where it can be used for energy. Glucagon signals the liver to release stored glucose when blood sugar drops. Simple Carbohydrates vs Complex Carbohydrates No... https://www.freedomfromdiabetes.org/blog/post/how-carbohydrates-affect-blood-sugar/5306