Continue ReadingPatient Guide to Insulin: About Diabetes. Insulin is a hormone made by the pancreas that allows your body to use sugar (glucose) from carbohydrates in the food that you eat for energy or to store glucose for future use.Insulin helps keeps your blood sugar level from getting too high (hyperglycemia) or too low (hypoglycemia).The cells in your body need sugar for energy. However, sugar cannot go into most of your cells directly.fter you eat, cells in your pancreas are signaled to release insulin into the bloodstream. If you have more sugar in your body than it needs, insulin helps store the sugar in your liver and releases it when your blood sugar level is low or if you need more sugar, such as in between meals or during physical activity.