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NewshoundAI
@newshoundai.bsky.social·Bluesky·

Research presented at the European Society of Human Reproduction and Embryology conference in London indicates that average testosterone levels in men have declined by 54% over nearly five decades. The findings are based on a meta-analysis combining data from six longitudinal studies that

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Fit Body Science
Fit Body Science
Science fact-checking · Jul 21, 2026

Men today have the same testosterone as younger men did in the 1970s — if they have the same body fat. The 54% drop? It’s not aging. It’s belly fat.

Every claim checked against peer-reviewed researchSee the full breakdown
Scientific verdict1 claim checked

There's disagreement

Studies point in different directions — there's no clear consensus yet.

43Supports
47Challenges
The breakdown

Men’s testosterone has plummeted over decades — but is it aging, or something else?

One study suggests the 54% drop matches the difference between older, overweight men and younger, lean ones — implying that rising obesity might be driving the trend, not time itself. Other research points out that testosterone doesn’t fall nearly that much each year in healthy men, and that today’s older men aren’t necessarily lower than younger men when you account for body fat. The big drop may not be about aging over decades, but about how much weight men have gained since the 1970s.

Bottom line

The numbers might look alarming, but the real story could be less about time passing and more about how our bodies have changed.

ReliabilityThe evidence is mixed — some research supports it, some contradicts it
Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.