Tribulus Terrestris
Tribulus terrestris
TL;DR
Tribulus does not raise testosterone in healthy men — multiple controlled trials are flat. It has modest, more credible signals for libido and sexual satisfaction, especially in women and in men with erectile dysfunction, which is a different claim from the one on the label.
Ideal For
- Adults exploring libido support with realistic expectations
Avoid If
- Pregnancy or breastfeeding
- Prostate cancer
- Kidney or liver disease
Frequently Asked Questions
Does tribulus raise testosterone?
Does it do anything at all?
What dose is used?
Will it affect a drug test?
Are there safety concerns?
What works better for testosterone?
Overview
Tribulus terrestris is one of the most persistently mismarketed supplements in sports nutrition. Controlled trials in resistance-trained men, rugby players and older men consistently find no change in total or free testosterone, luteinizing hormone or lean mass compared with placebo. Where the herb does show something is sexual function: randomized trials using standardized protodioscin extracts report improvements in IIEF scores in men with mild-to-moderate erectile dysfunction and in FSFI desire scores in women, including postmenopausal cohorts. The plausible mechanism is nitric oxide and androgen-receptor-independent central effects rather than endocrine stimulation.
How It Works
- Protodioscin saponins support nitric oxide mediated vasodilation
- Possible central dopaminergic effect on desire
- No demonstrated effect on LH or testosterone production in humans
Quick Facts
- Does not raise testosterone in controlled human trials
- Libido signals exist independent of hormone change
- Trial extracts are standardized to 45-60% protodioscin
Benefits & Outcomes
No linked outcomes yet. Research is ongoing.
Health Concerns Addressed
Decreased Sex Drive
Small trials show real score improvements, but effect sizes are moderate, extracts differ widely, and hormone-mediated explanations do not hold up.
Erectile Dysfunction
Small trials disagree: a positive 180-man trial and meta-analysis against a null trial and low-quality evidence; no effect on testosterone.
Low Testosterone (Male Hypogonadism)
This is the clearest negative in the testosterone-booster category — the marketing claim has been tested repeatedly and failed.
Supporting Research14 studies
Tribulus terrestris for management of patients with erectile dysfunction: a systematic review and meta-analysis of randomized trials
Suharyani S, Amanda B, Angellee J +3 more
Tribulus terrestris outperformed placebo
Herbal dietary supplements for erectile dysfunction: A systematic review and meta-analysis of randomized-controlled trials
Ho CY, Hsu CH, Chien TJ
evidence for other agents such as Tribulus terrestris and Maca remains insufficient
Pilot Study on the Effect of Botanical Medicine (Tribulus terrestris) on Serum Testosterone Level and Erectile Function in Aging Males With Partial Androgen Deficiency (PADAM)
Roaiah MF, El Khayat YI, GamalEl Din SF +1 more
(750 mg/day) of Tribulus terrestris in 3 divided doses
The Effect of the Combination of Ginseng, Tribulus Terrestris, and L-arginine on the Sexual Performance of Men with Erectile Dysfunction: a randomized, double-blind, parallel, and placebo-controlled clinical trial
Tahvilian R, Golesorkhi MA, Parhoudeh F +4 more
Each herbal tablet contained 100 mg of protodioscin, 35 mg of ginsenosides, and 250 mg of L-arginine
Alga Ecklonia bicyclis, Tribulus terrestris, and glucosamine oligosaccharide improve erectile function, sexual quality of life, and ejaculation function in patients with moderate mild-moderate erectile dysfunction: a prospective, randomized, placebo-controlled, single-blinded study
Sansalone S, Leonardi R, Antonini G +4 more
alga Ecklonia bicyclis, Tribulus terrestris, and glucosamine oligosaccharide (Tradamix TX1000)
Beneficial effects of natural products on female sexual dysfunction: A systematic review and meta-analysis
Sha'ari N, Woon LS, Sidi H +1 more
Tribulus terrestris showed a significant positive effect in improving overall female sexual function (SMD = 1.12, 95% CI = 0.46 - 1.79, p = 0.001)
Tribulus terrestris versus placebo in the treatment of erectile dysfunction: A prospective, randomized, double blind study
Santos CA Jr, et al.
At the dose and interval studied, Tribulus terrestris was not more effective than placebo on improving symptoms of erectile dysfunction or serum total testosterone.
Pro-sexual and androgen enhancing effects of Tribulus terrestris L.: Fact or Fiction
Neychev V, Mitev V
Human studies consistently failed to show testosterone elevation with Tribulus terrestris
Evaluation of the efficacy and safety of Tribulus terrestris in male sexual dysfunction: a prospective, randomized, double-blind, placebo-controlled clinical trial
Kamenov Z, Fileva S, Kalinov K +1 more
Tribulus terrestris improved IIEF erectile function and desire scores versus placebo without changing testosterone
Dietary Supplements for Erectile Dysfunction: Analysis of Marketed Products, Systematic Review, Meta-Analysis and Rational Use
Petre GC, Francini-Pesenti F, Vitagliano A +1 more
DSs marketed in Italy are usually blends of many substances that are frequently employed at a negligible dose or without any evidence
The aphrodisiac herb Tribulus terrestris does not influence the androgen production in young men
Neychev VK, Mitev VI
No significant change in total or free testosterone, androstenedione or luteinizing hormone versus placebo
Herbal Dietary Supplements for Erectile Dysfunction: A Systematic Review and Meta-Analysis
Borrelli F, Colalto C, Delfino DV +2 more
saffron and T. terrestris treatment produced mixed results
Effects of Tribulus (Tribulus terrestris L.) Supplementation on Erectile Dysfunction and Testosterone Levels in Men-A Systematic Review of Clinical Trials
Cieslinska A, Kostyra E
Trials showed inconsistent effects on erectile function and no reliable increase in testosterone
Tribulus terrestris versus placebo in the treatment of erectile dysfunction and lower urinary tract symptoms in patients with late-onset hypogonadism: A placebo-controlled study
GamalEl Din SF, Abdel Salam MA, Mohamed MS
Erectile and lower urinary tract symptom scores improved modestly versus placebo in late-onset hypogonadism
Safety Information
Potential Side Effects
Stomach upset, cramping and reflux. Case reports of nephrotoxicity and hepatotoxicity exist at high or adulterated doses.
Contraindications
Avoid in prostate cancer, pregnancy and breastfeeding. Case reports link high doses to kidney and liver injury.
Drug Interactions
- Diabetes medications
- Lithium
Pregnancy & Breastfeeding
Pregnancy: Likely unsafe
Breastfeeding: Likely unsafe
Dosage Guidelines
Dosage Used in Studies
250-750 mg extract
Best Time to Take
With meals
Best Form
Extract standardized to protodioscin content
Bioavailability
Saponin absorption is limited and highly extract-dependent; unstandardized products vary widely.
Dosing by Goal
| Goal | Dose | Notes |
|---|---|---|
| Typical | 250-750 mg standardized extract daily | Sexual function trials commonly used 750 mg/day in three divided doses for 12 weeks |
Forms Compared
Protodioscin-standardized extract
The form used in sexual function trials
Whole herb powder
Saponin content unverified, results unpredictable
Medical Disclaimer
The information provided on this website is for educational and informational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition or before starting any supplement regimen.
Individual results may vary. The statements on this website have not been evaluated by the Food and Drug Administration. Products and information are not intended to diagnose, treat, cure, or prevent any disease.