Insulin is a kind of hormone. It helps your body use the sugar in the food you eat as fuel.

In some people, the tissues stop responding to insulin. Doctors refer to this condition as insulin resistance. If you have insulin resistance, your body will make more and more insulin, but because the tissues don't respond to it, your body won't be able to use sugar properly.

Insulin resistance often goes along with other health problems, such as diabetes, high cholesterol, high blood pressure and heart attack. When a person has many of these problems together, doctors call it insulin resistance syndrome.

To read more about IRS & Obesity, please read Dr. Nathan Newman’s article: IRS and Obesity