Written by Fertility Decoded. Reviewed by D R, MS (OBG), FRM. Review date: 31 August 2026.
The verdict
Multiple peer-reviewed case reports of severe liver and kidney injury exist alongside some evidence for sperm parameters in infertile men — this is a real safety trade-off, not a minor caveat. Testosterone-boosting claims are separately not well supported.
An Ayurvedic herb marketed as a testosterone/libido booster and male-fertility aid; very common in Indian men's health products.
What the evidence shows
1A meta-analysis (~133 subjects, idiopathic male infertility) found significant improvement in sperm concentration and motility. Testosterone-boosting evidence is much weaker — most studies show no significant androgen change; the two that did involved men with existing hypogonadism and a small effect size.
Evidence tier
⛔Documented harm
⛔ Peer-reviewed evidence of serious adverse effects from the item's own chemistry/pharmacology or a well-characterized allergic mechanism. More serious than contamination; not resolved by buying a 'reputable brand'.
Frequently asked questions
Does Tribulus improve fertility or testosterone?▾
A meta-analysis found improved sperm concentration and motility in infertile men; testosterone-boosting claims are weak.
Is Tribulus safe?▾
Peer-reviewed case reports document severe liver and kidney injury after use. Discuss with a doctor and avoid it with any liver or kidney condition.