Evidence check: Testosteron in the context of Langlebigkeit

The role of testosterone in longevity is complex and involves a biological trade-off. On one hand, testosterone supports muscle mass, bone density, and cognitive function – factors associated with reduced frailty in aging. On the other hand, chronically elevated testosterone (e.g., via exogenous supplementation) can activate the mTOR pathway, potentially accelerating age-related diseases such as prostate cancer and insulin resistance. Human evidence is moderate: low testosterone is linked to higher mortality and frailty, but randomized controlled trials of testosterone supplementation have not demonstrated clear lifespan extension. The effect depends on baseline levels, age, and health status. Some observational data suggest a U-shaped relationship – both very low and very high levels may be detrimental. Current evidence does not support routine testosterone supplementation for longevity. Caution is warranted: self-administration without medical indication carries risks (cardiovascular events, prostate cancer). In summary, testosterone is an important but not isolated factor in the longevity puzzle.