How are Insulin and Müdigkeit related?

Insulin and fatigue are closely linked through blood glucose regulation. Insulin lowers blood sugar by moving glucose into cells. In insulin resistance (e.g., prediabetes or type 2 diabetes), glucose stays in the bloodstream, cells are starved of energy, leading to chronic fatigue, especially after meals. Excess insulin can also cause reactive hypoglycemia: blood sugar drops sharply, triggering sudden tiredness, shakiness, and brain fog. Conversely, poor sleep reduces insulin sensitivity, creating a vicious cycle. Consumer tests (e.g., MyBody-X) may offer single biomarkers like fasting insulin or HOMA-IR, but a reliable assessment requires medical evaluation with an oral glucose tolerance test and HbA1c. The evidence for this relationship is human-strong, but individual lifestyle factors (diet, exercise, stress) dominate. Safety note: persistent fatigue should be investigated by a doctor, not solely via home tests.