What role does FT3 play in Blutzucker?

FT3 (free triiodothyronine) is the active thyroid hormone and influences blood glucose through several mechanisms: it increases hepatic glucose production (gluconeogenesis and glycogenolysis), enhances intestinal glucose absorption, and modulates insulin sensitivity. In hyperthyroidism (high FT3), fasting blood glucose and glucose intolerance are common; in hypothyroidism (low FT3), glucose utilization may be impaired, leading to fluctuations. However, effects are individual and depend on diet, exercise, and genetics. A direct causal link between FT3 levels and blood sugar is not always clear in clinical practice because thyroid function and glucose metabolism are tightly interconnected. The evidence is based on physiological mechanisms and clinical observations, not on randomized trials with FT3 as the sole factor. Note: If blood glucose is abnormal, thyroid function should also be evaluated.