Lay opinion vs evidence: Testosteron Genetik

Lay opinion often claims that a single gene test can reveal your 'testosterone potential' and dictate whether you need supplements or therapy. The scientific reality is more nuanced. Testosterone levels are influenced by dozens of genes (e.g., SRY, AR, CYP17A1, SHBG) and are highly modifiable by lifestyle factors like diet, exercise, sleep, and stress. Heritability estimates for testosterone are around 50–60%, but the effect of any single common variant is tiny (typically <1% variance explained). Direct-to-consumer genetic reports on testosterone often rely on weak or unreplicated associations. Evidence is moderate: observational and GWAS data exist, but no robust clinical trials show that acting on these variants improves outcomes. Importantly, testosterone supplementation carries risks and should only be considered after clinical blood tests and medical evaluation. The gap between lay hype and evidence is wide; consumers should be skeptical of actionable claims from genetic tests alone.