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Low Testosterone

Studies on low testosterone, what drives it, when it is real versus a measurement artifact, and what lifts it naturally.

85Studies

85Human studies

2026Most recent

13Countries

Effects of cigarette smoking on semen quality, reproductive hormone levels, metabolic profile, zinc and sperm DNA fragmentation in men: results from a population-based study.

Frontiers in endocrinology2023n = 1,222 (450 smokers, 772 non-smokers)

Cross SectionalHuman

This study set out to examine how cigarette smoking affects semen quality, hormone levels, metabolic health, zinc levels, and sperm DNA damage in young Russian men. It compared 450 smokers…

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