What role does TSH Schilddrüse play in blood sugar?

TSH (thyroid-stimulating hormone) is secreted by the pituitary gland and stimulates the thyroid to produce T3 and T4. These thyroid hormones regulate basal metabolic rate, intestinal glucose absorption, insulin sensitivity, and hepatic gluconeogenesis. Consequently, abnormal TSH levels—as seen in hypo- or hyperthyroidism—can indirectly affect blood sugar. However, TSH itself does not directly regulate blood glucose; it is a marker of thyroid function. The evidence for a direct role of TSH in blood sugar metabolism is weak and based on physiological mechanisms (mechanistic). For blood sugar issues, a full thyroid panel (TSH, free T4, free T3, antibodies) should be evaluated by a physician. Caveat: TSH fluctuates with time of day, stress, and illness; a single measurement is not diagnostic.