Cohort Studymoderate evidence
Low measured free testosterone is associated with worse sexual function in community-dwelling men.
European journal of endocrinology·July 30, 2026·PMID 42530279
Why it mattersMeasured free testosterone by equilibrium dialysis may better capture androgen-related sexual dysfunction than total or calculated free testosterone, particularly in older men. The identified thresholds for erectile function and orgasm frequency could help clinicians interpret lab results and guide discussions about testosterone therapy.
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