The hype and science behind testosterone therapy for men and women
Experts explain that testosterone’s touted health perks lack solid proof, and hormone replacement is only sanctioned for medically confirmed low levels.
Testosterone, a sex hormone present in all genders, drives traits such as muscle mass, hair growth and sexual drive, but its perceived benefits are often overstated. Surveys reveal many men view the hormone as a marker of masculinity, and some government plans even propose testing soldiers’ levels for performance gains, despite ongoing restrictions on gender-affirming hormone care. Clinical research, including the early "TTrials" and the later TRAVERSE study, found that testosterone therapy can modestly enhance libido, mood, walking distance, bone density and red-blood-cell production, while also raising concerns about arterial plaque, irregular heartbeats and bone fractures.
The FDA currently permits testosterone replacement only for men with unequivocally low levels—typically below 300 ng/dl. For women, limited evidence supports use only in postmenopausal cases of low sexual desire, and no FDA-approved products exist. Over-the-counter supplements claiming to raise testosterone lack credible scientific validation, and their labels are not vetted by the FDA.
Why it matters
Understanding testosterone's real effects helps consumers avoid unsafe treatments and informs medical guidelines.
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