Botanicals & Herbs

Tribulus Terrestris

Also known as: Puncture vine, Gokshura, Tribulus extract

The classic 'testosterone booster' herb — real libido data from animal and some human work, but no T-boost in healthy men.

By IngredientWiki Editorial Team
Fact-checked by IngredientWiki Editorial Team
Updated 2026-09-26
2 min read

In short

Tribulus terrestris (puncture vine) is a spiny plant used in Ayurveda, traditional Chinese medicine, and Balkan folk medicine, best known today as a sports 'testosterone booster.' The evidence splits cleanly: protodioscin-standardized tribulus improves sexual function and libido in animal studies and in some human trials of men with low desire — likely via nitric-oxide and androgen-receptor signaling rather than hormone elevation — while randomized trials in healthy athletes repeatedly find no change in testosterone, strength, or body composition. It is well tolerated at standard doses, with the main cautions being blood-sugar lowering and theoretical interactions with hormone therapies.

Spiny plant used in Ayurveda, TCM, and Balkan tradition
Protodioscin-standardized extracts: libido evidence in low-desire men
No testosterone or strength effect in healthy athletes
Well tolerated; blood-sugar caution with diabetes drugs

What is Tribulus Terrestris?

Tribulus is the supplement world's most persistent case of right herb, wrong claim. Marketers sell it as a testosterone booster for athletes, and decades of randomized trials have answered that claim: no effect on testosterone, strength, or muscle in healthy men. But the plant is not inert — standardized extracts have genuine libido and sexual-function data in men with low desire, likely working through receptor-level and nitric-oxide mechanisms that don't show up as hormone spikes. Tribulus works, just not on the axis it was sold for.

Where it comes from

Natural sources

Fruit of Tribulus terrestris, a widespread spiny plant native to Eurasia and Africa
Used in Ayurveda (gokshura) for urinary and reproductive health
Active marker: steroidal saponins, chiefly protodioscin

How it's made

Capsules standardized to 20–90% saponins or 20–45% protodioscin; typical doses 250–750 mg.

What it does in products

Benefits

Libido and sexual function

moderate evidence

Animal studies and several human trials in men with low desire report improved libido and erectile parameters, particularly with protodioscin-rich extracts.

Testosterone elevation

emerging evidence

Randomized trials in healthy athletes consistently find no significant change in testosterone or LH — the marketing claim fails the evidence test.

Body-composition and strength gains

emerging evidence

Multiple controlled trials report no meaningful effect on muscle mass or strength in trained men.

Side effects & safety

Stomach upset and cramping (uncommon)Mild and dose-dependent.

Hypoglycemia with diabetes medications (rare)Animal and small human data suggest glucose-lowering.

Safety considerations

Avoid — traditional use includes uterine-stimulating properties.
Diabetes medications — additive glucose-lowering possible
Hormone therapies — theoretical interaction; avoid without supervision
Not for: Pregnancy and breastfeeding
Not for: Prostate conditions (theoretical androgen-sensitivity concern)

How it's used

In supplements

250–750 mg/day of extract standardized to 20–45% protodioscin; effects on libido assessed over 4–12 weeks.

In skincare

Not a topical ingredient.

Regulatory status

Sold as a dietary supplement; no FDA-approved disease claims.
Not applicable.

The evidence split

A 2016 systematic review of 12 trials in healthy men found no significant testosterone, strength, or body-composition effects — a consistent null result across over a decade of studies. Meanwhile, trials in men with erectile dysfunction or low desire, especially with protodioscin-standardized extracts, report functional improvements. The two findings coexist because tribulus appears to act on receptors and vascular signaling, not hormone output.

The protodioscin question

Bulgarian research identified protodioscin as the key saponin, and commercial extracts standardize to it. Products with weak standardization are the most common reason for disappointing results — the effective material in the positive trials carried 20–45% protodioscin.

Frequently asked questions

Does tribulus raise testosterone?

In healthy men, the evidence says no — randomized trials repeatedly find no effect on testosterone or LH. In specific low-androgen or fertility contexts the data are more mixed, but the sports claim is unsupported.

What is tribulus actually good for?

Its strongest human evidence is libido and sexual function in men with low desire, plus traditional use for urinary and reproductive support.

Can women take tribulus?

Traditional use includes female reproductive support, but modern trials are thin. Avoid in pregnancy and with hormone-sensitive conditions.

The bottom line

Tribulus is a legitimate libido herb with the wrong headline — its testosterone-booster fame is a marketing artifact, while its real, modest evidence sits in sexual function.

References

Tribulus terrestris in healthy men: systematic review. Journal of Dietary Supplements. https://pubmed.ncbi.nlm.nih.gov/27101892/
Tribulus terrestris for sexual dysfunction. PubMed Central. https://pubmed.ncbi.nlm.nih.gov/27163171/
Tribulus terrestris — NCCIH. NCCIH. https://www.nccih.nih.gov/health/tribulus-terrestris