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Tribulus Terrestris — Frequently Asked Questions

This content is for informational purposes only and does not constitute medical advice. Consult your healthcare provider before starting any supplement. Full disclaimer

Frequently Asked Questions

Does tribulus terrestris increase testosterone?

No, according to the best available evidence. Multiple systematic reviews and RCTs have found that tribulus does not significantly increase total or free testosterone levels in healthy men. Studies in elite athletes and healthy young men consistently show no hormonal changes. The testosterone-boosting claims originate from early animal studies and in vitro research that has not been replicated in human clinical trials.

If tribulus does not boost testosterone, why does it improve libido?

The libido-enhancing effects of tribulus appear to work through non-hormonal mechanisms. Proposed pathways include increased nitric oxide production (improving blood flow), effects on dopaminergic neurotransmission (the brain's desire/reward pathway), and possible androgen receptor sensitization. Several well-designed RCTs confirm improvements in sexual desire and satisfaction without corresponding testosterone increases.

Is Bulgarian tribulus better than other sources?

Bulgarian tribulus has traditionally been considered superior due to reportedly higher protodioscin content, which is influenced by soil, climate, and harvest conditions. However, no head-to-head clinical trials have compared tribulus from different geographic sources. What matters most is the standardized saponin content (look for 45-60% steroidal saponins) rather than the country of origin. Third-party testing for protodioscin content is more reliable than geographic sourcing claims.

Full Tribulus Terrestris Guide

References

  1. (). Evaluation of the efficacy and safety of Tribulus terrestris in male sexual dysfunction — a prospective, randomized, double-blind, placebo-controlled clinical trial. Maturitas. DOI
  2. (). A systematic review on the herbal extract Tribulus terrestris and the roots of its putative aphrodisiac and performance enhancing effect. Journal of Dietary Supplements. DOI
  3. (). The effect of five weeks of Tribulus terrestris supplementation on muscle strength and body composition during preseason training in elite rugby league players. Journal of Strength and Conditioning Research. DOI