What role does TSH Schilddrüse play in Blutzucker?

TSH (thyroid-stimulating hormone) is secreted by the pituitary gland and regulates the release of thyroid hormones T3 and T4. These hormones influence blood glucose metabolism in several ways: they increase hepatic gluconeogenesis, promote glycogenolysis, and modulate tissue insulin sensitivity. An elevated TSH level typically indicates hypothyroidism, which is associated with a reduced metabolic rate and often with decreased insulin sensitivity – potentially contributing to higher blood sugar levels. However, the relationship is complex: both hyper- and hypothyroidism can impair glucose tolerance, and many observational studies link subclinical hypothyroidism to insulin resistance. Still, TSH is not a direct regulator of blood glucose but an indirect marker. The evidence comes mainly from physiological models and observational studies; large randomized trials are lacking. In clinical practice, TSH is routinely checked in diabetic patients because unrecognized thyroid dysfunction can complicate glycemic control. Caveat: A single TSH measurement without T3/T4 and clinical context is insufficient for metabolic diagnosis.