Is TSH useful for Haut?

TSH (thyroid-stimulating hormone) is a key biomarker for thyroid function. Since thyroid hormones directly affect skin metabolism—dryness, elasticity, hair growth—an abnormal TSH can indicate an underlying thyroid disorder that manifests in the skin. However, TSH alone is not a specific skin marker. Healthy skin depends on many factors: diet, hydration, microbiome, UV exposure, genetics. In a consumer test like MyBody-X, TSH can provide initial orientation as part of a broader panel (e.g., with fT3, fT4, antibodies), but it does not replace medical diagnosis. The evidence for the direct utility of TSH for skin assessment is mechanistic and moderate: well-established links between thyroid function and skin health exist, but there is no strong evidence that an isolated TSH value without clinical symptoms yields meaningful skin recommendations. Caveat: normal TSH does not rule out subclinical thyroid issues; abnormal values require medical follow-up. Overall, TSH is useful as part of thyroid evaluation, but not as a standalone skin biomarker.