Human study · Supplements / medicine · 19 Aug 2026
In 30,453 UK women, testosterone fell about 1.4% a year from the 20s with no sudden menopause cliff
Source: Silicon Republic
What the research found
Study (observational). Hertility analysed at-home hormone tests from 30,453 women aged 18–74 in England, Scotland and Wales (2020–2025), published in the Journal of Endocrinological Investigation. Testosterone declined about 1.4% per year from the 20s, without an abrupt perimenopausal drop. The authors argue age-specific ranges beat a single cut-off. Self-selected testers, not a clinic trial. Educational research notes, not a testosterone prescription.
Evidence level: Human study. A study in people, but an association isn't proof of cause.
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