What role does TSH play in Langlebigkeit?

TSH (thyroid-stimulating hormone) regulates thyroid function and metabolism. An optimal TSH level is important for health, but the direct role of TSH in longevity is not supported by the provided context. The knowledge sources contain no specific information linking TSH to longevity. Consumer tests often overclaim such associations. TSH should be interpreted as part of routine thyroid assessment, not as a standalone longevity marker. Evidence: unclear.