Men’s Testosterone Levels Have Fallen by Half in 50 Years and Scientists Are Worried
A new analysis indicates that average male testosterone levels have declined by 54% between 1972 and 2019 across five countries. Researchers suggest this trend may signal broader issues regarding male reproductive health and metabolic well-being.
Why it matters
Identifies a significant long-term public health trend that could impact global fertility and chronic disease rates.
Something keeps happening to men’s hormones. Across nearly 50 years and five countries, testosterone levels have fallen sharply — and researchers say it may signal a wider crisis in male reproductive health.
Reports on scientific findings and expert commentary without taking a political stance.
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