Myths vs facts: FT3 and Schlaf

The question of myths vs facts regarding FT3 (free triiodothyronine) and sleep is not addressed in the provided context. Generally, FT3 is the active thyroid hormone regulating metabolism. Some studies suggest an association between low FT3 and poor sleep quality or shorter sleep duration, but the evidence is inconsistent. There is no robust proof that FT3 alone significantly impacts sleep – factors like TSH, T4, circadian rhythms, and stress play larger roles. Myths such as 'low FT3 always causes insomnia' are not supported by controlled studies. Without specific context data, the explanatory power is limited. Consumers should not rely on single biomarkers but consider the full thyroid function profile.