Is Cortisol useful for Langlebigkeit?

Cortisol is a vital stress hormone essential for acute survival, but chronically elevated levels are consistently linked to accelerated aging. Observational studies associate long-term high cortisol with increased oxidative stress, cognitive decline, insulin resistance, and cardiovascular risk—all factors that shorten healthspan and lifespan. A single cortisol blood test, such as offered by MyBody-X, can provide a snapshot but is insufficient to assess longevity. Cortisol fluctuates diurnally and is acutely affected by stress, sleep, and exercise. The evidence for cortisol as a direct longevity biomarker is moderate and primarily mechanistic/observational. It is more useful when interpreted alongside other markers like CRP, DHEA, and HbA1c, and measured repeatedly over time. Caveat: An isolated high reading does not diagnose chronic stress or predict early death; it should prompt lifestyle evaluation (sleep, nutrition, training load). For longevity, a comprehensive biomarker panel and holistic health habits are far more informative than a single hormone value.