Myths vs facts: FT3 and Blutzucker

FT3 (free triiodothyronine) is the active thyroid hormone and influences metabolism, including glucose regulation. Fact: Hyperthyroidism (elevated FT3) can raise blood sugar by stimulating gluconeogenesis and glycogenolysis. Myth: FT3 directly causes diabetes – the effect is moderate and modulated by insulin resistance, genetics, and lifestyle. A direct-to-consumer DNA test for FT3 levels is not evidence-based, as FT3 is highly dynamic and influenced by diet, stress, and medications. Evidence level: human-observational. Caveat: Do not interpret FT3 or blood sugar changes without clinical context; thyroid disorders require proper lab testing and medical guidance.