Evidence check: Body-Balance Check | Testosteron-Test in the context of skin aging

The claim that a testosterone test within a Body-Balance Check provides meaningful insights into skin aging is weakly supported by science. Testosterone does influence collagen production and sebaceous gland activity, which theoretically can affect skin elasticity and hydration. However, effects are highly individual and confounded by genetics, lifestyle, UV exposure, and nutrition. Direct-to-consumer tests typically measure total testosterone, not free or bioavailable testosterone, nor local skin concentrations. Robust longitudinal studies demonstrating a clear causal link between circulating testosterone and skin aging are lacking. Evidence rests mainly on mechanistic and small observational studies. Therefore, such a test cannot reliably guide anti-aging interventions. Proven strategies like sun protection, balanced diet, and moisturizing remain evidence-based. Caution is warranted against overhyped marketing: a single hormone value does not replace a comprehensive dermatological assessment.