What role does TSH Schilddrüse play in skin aging?

TSH (thyroid-stimulating hormone) is a key regulator of thyroid function. Dysregulated TSH secretion leads to thyroid dysfunction (hypo- or hyperthyroidism), which is well-documented to affect skin aging. Hypothyroidism causes dry, coarse skin, reduced collagen synthesis, and delayed wound healing—factors that accelerate skin aging. Hyperthyroidism can result in thin, fragile skin and premature wrinkling. Whether TSH directly, independent of thyroid hormones, acts on skin cells is not fully established. There is evidence of TSH receptors on keratinocytes and fibroblasts, potentially influencing collagen production and antioxidant defenses. However, the evidence is largely based on observational studies and in vitro data. A normal TSH level (0.4–4.0 mU/L) is an important marker for skin health, but TSH alone without T3/T4 measurement is insufficient to assess skin aging processes. Caveat: TSH is a screening parameter, not a direct anti-aging biomarker. Abnormal values warrant medical evaluation.