Ingredient guide
Tribulus terrestris is a plant marketed for testosterone, but human studies show it does not reliably raise testosterone. The more promising, though still uncertain, evidence is for libido in people with low baseline desire.
Limited evidenceTribulus terrestris is a small flowering plant, sometimes called puncturevine. Its fruit and root have a long history in traditional medicine, and it is now a staple of testosterone and male-vitality products. The suspected active compounds are saponins, which vary a lot between products.
Marketing claims that tribulus raises testosterone, often by supposedly increasing luteinising hormone. The trouble is that human studies do not back this up. Any real effect on desire seems to work through other pathways in the brain and body, not through a clear rise in testosterone.
On testosterone, the verdict is fairly clear and disappointing for the marketing. Across studies in men and women, tribulus does not reliably raise testosterone. The few positive findings were small and mostly in people with already low hormone levels.
On libido, the picture is more hopeful but uncertain. Some trials report meaningful increases in sexual desire in men and women who started with low libido, using 500 mg to 1,500 mg per day. Reviewers rate the certainty as very low, meaning future studies could easily change the conclusion. We grade the evidence as limited. Tribulus is not a testosterone aid, and its libido benefit is promising but unproven.
Libido studies use 500 mg to 1,500 mg per day, but saponin content varies widely between products, so a clear standardisation is worth seeking. Set expectations against the evidence, which does not support testosterone claims. Check with your healthcare provider before use if you take medication or have a hormone-sensitive condition.
Libido studies have used roughly 500 mg to 1,500 mg per day for 1 to 3 months. There is no established dose, and product saponin content varies widely. Ask your healthcare provider before use, especially if you take medication or have a hormone-sensitive condition.
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Some trials report improved sexual desire in men and women with low baseline libido, but reviewers rate the certainty as very low. It is promising but unproven.
Libido studies use roughly 500 to 1,500 mg per day for 1 to 3 months. Saponin content varies a lot between products.
Short-term use is generally well tolerated. Avoid it in pregnancy, and check with a provider if you have a hormone-sensitive condition or take medication.