A condition in which the body needs extra insulin to maintain normal blood sugar levels. Along with abnormal insulin secretion, it is a hallmark of Type 2 diabetes.
Ordinarily, insulin prods the liver to decrease its production of glucose. It also helps the body’s fat and muscle tissues use glucose in the blood for energy. Insulin resistance generally takes two forms: the liver may produce too much glucose, or the body’s tissues may not use glucose from the blood efficiently.