Is TSH useful for Darmgesundheit?

Based on the provided context, there is no direct evidence that TSH is useful for assessing gut health. TSH (thyroid-stimulating hormone) is a marker of thyroid function. While some research suggests that thyroid hormones can influence gut motility, permeability, and the microbiome, this is not a standard clinical application. The context includes information on CRP, cholesterol, cortisol, and microbiome tests, but nothing linking TSH to gut health. Therefore, the evidence is unclear. For gut health, more specific tests like fecal calprotectin, microbiome analysis, or clinical symptoms are typically used. TSH may be relevant if thyroid dysfunction is suspected, but it is not a direct measure of gut health. Consumers should not rely on TSH alone for this purpose. Evidence level: mechanistic/unclear. Safety note: TSH testing is safe, but interpreting it for gut health without medical guidance is not recommended.