Zinc
The verdict
May modestly improve some sperm-quality markers; not shown to raise pregnancy or live-birth rates.
A trace mineral essential to sperm formation; sold standalone and in most male-fertility combo products.
What the evidence shows
Systematic reviews: supplementation significantly improves sperm morphology, motility, and semen volume; no significant effect on concentration, count, or viability.
Evidence tier
Non-Cochrane evidence🟡 Smaller systematic reviews/meta-analyses or RCTs exist, no Cochrane-grade synthesis. Emerging, not proven.
Sources
Take this further
Last reviewed .