Can FT3 help with Darmgesundheit?

The question of whether free triiodothyronine (FT3) can improve gut health cannot be directly answered from the provided context. FT3 is a thyroid hormone that regulates metabolism and may indirectly influence gut motility and barrier function. The context mentions dysbiosis as a hallmark of aging, but no specific link to FT3 is established. In clinical practice, FT3 is used to assess thyroid status, not to treat gut issues. Some mechanistic studies suggest thyroid hormones affect intestinal epithelial integrity, but human evidence is lacking. Without direct clinical trials or validated biomarkers, the claim remains speculative. Patients with gut symptoms should not self-administer FT3 without medical supervision, as excess can cause hyperthyroid side effects. The evidence level is 'unclear'.