Myths vs facts: Insulin and Müdigkeit

Myths vs facts: Insulin and fatigue. A common myth is that insulin itself causes fatigue. In reality, insulin is a hormone that helps glucose enter cells. Fatigue arises more from insulin resistance: cells take up glucose poorly, blood sugar stays high, but cellular energy supply is impaired – leading to exhaustion. Another myth: high insulin levels directly cause fatigue. Fact: hyperinsulinemia is often a marker of insulin resistance, but fatigue is multifactorial (sleep, stress, inflammation). Studies show that improving insulin sensitivity through fiber, exercise, and weight loss can reduce fatigue. However, effects are individual. Beware of exaggerated claims from diet products that promise instant energy by lowering insulin. Evidence is strong for the link between insulin resistance and fatigue, but weaker for specific supplements. Persistent fatigue should always be evaluated by a doctor to rule out other causes (thyroid, iron deficiency, etc.).