What does a low Insulin result mean?

A low insulin level in the blood is often a normal finding, especially after prolonged fasting or in individuals with high insulin sensitivity. Insulin is secreted by the pancreas to regulate blood glucose. A low fasting insulin can indicate efficient glucose metabolism. However, an abnormally low insulin combined with high blood glucose suggests absolute insulin deficiency, as seen in type 1 diabetes or advanced type 2 diabetes. Rare conditions like insulinoma typically cause high, not low, insulin. In a healthy person without symptoms, a low insulin value is usually benign. Interpretation must consider glucose levels, HbA1c, and clinical symptoms. Individual decisions should be discussed with a physician. Evidence is based on clinical practice and basic physiology.