Fasting Insulin Test: What Is Insulin & How to Manage Its Levels

Illustration of the cycle of insulin resistance, highlighting the steps from eating food to storing sugar as fat, emphasized by a Fasting Insulin Test.

​A fasting insulin test may be your key to an early diagnosis of one of the most common life-threatening disease of today—diabetes. Diabetes mellitus is a serious condition in which your body’s blood glucose or blood sugar levels are above the normal range. According to the American Diabetes Association, 30.3 million Americans have diabetes—that was in 2015, and the number is expected to rise by 2050. ​To understand diabetes more and the tests needed to detect it, we have to discuss the hormone behind the production and control of glucose: insulin.