How are TSH Schilddrüse and longevity related?

The relationship between TSH (thyroid-stimulating hormone) and longevity is complex and not fully resolved. TSH regulates thyroid function, which in turn influences metabolism, heart rate, and cellular aging. Some observational studies suggest that slightly elevated TSH (subclinical hypothyroidism) may be associated with increased lifespan in older adults, possibly due to reduced metabolic rate and oxidative stress. However, evidence is conflicting: other studies link elevated TSH to higher cardiovascular risk. Genetic variants in TSH receptor (TSHR) or thyroid hormone metabolism genes (e.g., DIO2) have been nominally associated with longevity in GWAS, but effect sizes are very small. Consumer DNA tests reporting TSH-related SNPs lack clinical utility for predicting individual lifespan. The evidence is primarily observational and mechanistic. Caveat: TSH levels fluctuate with age, diet, stress, and medications. A genetic-only approach is misleading. For credible longevity assessment, blood-based thyroid function tests (TSH, fT3, fT4) are more informative than DNA tests.