Diabetes mellitus is a common disease that interferes with the body's ability to store energy from food. The pancreas makes a substance called insulin that helps to store energy from food. In type 2 diabetes (also called adult-onset diabetes), the body makes plenty of insulin but is unable to use it normally. The result is high blood sugar levels that, over time, can lead to complications that include blindness, kidney failure, nerve damage, and cardiovascular disease (heart attacks and strokes). While good blood sugar control can prevent the development of most of these complications, it does not prevent the development of cardiovascular disease. The control of lipids (cholesterol and other fats in the blood) is very important in preventing the cardiovascular complications of type 2 diabetes.