Whenever you eat, your body breaks down your food into the most basic sugar, glucose, which serves as fuel for your body's cells. This glucose then goes into the blood to be shipped to the cells. Insulin's role in the body is to move all this glucose into the body's cells. People with type 2 Diabetes either don't produce enough insulin or have cells that don't respond to insulin. This means that the glucose stays in the bloodstream, which could lead to: - cells that don't get enough energy - damaged eyes, kidneys, nerves, or heart.