Tribulus Supplement: Real Effectiveness or Myth?

On the question of testosterone and muscle, tribulus is mostly myth: trials conducted in humans show no rise in testosterone in healthy men, nor any strength gains. On libido and mild erectile function, the picture is more nuanced, with a few positive trials, but still a low level of evidence. Here's the verdict, promise by promise, to help you decide whether this plant deserves a place in your routine.

Where Tribulus's Reputation Comes From

Tribulus terrestris, also known as puncture vine, caltrop, or goat's head, is a creeping plant with spiny fruit. It has a long history in two major traditional medicine systems.

• In Ayurveda, under the name gokshura, it was used as a diuretic, for difficult urination, for hemorrhoids, and as a male aphrodisiac.
• In traditional Chinese medicine, under the name ji li, it was used notably for headaches, dizziness, red eyes, and itching.

Its modern reputation came from elsewhere: the bodybuilding world. The plant contains steroidal saponins, including protodioscin, and animal studies have observed a rise in testosterone. That was all it took for tribulus to end up in a flood of "men's" products and formulas marketed as natural hormone boosters.

What Health Canada Allows on the Label

This is a telling clue. Health Canada's monograph on tribulus, updated in May 2026, only permits traditional claims, drawn from Ayurveda or Chinese medicine. For example: "Used traditionally in Ayurveda as Vrsya (aphrodisiac) for men."

You won't find any claim related to testosterone, muscle mass, or athletic performance. In other words, a product authorized in Canada cannot legitimately promise to "boost" your hormones.

The Verdict, Promise by Promise

Promise #1: Raise Testosterone

Verdict: myth in healthy men.

In a trial conducted with 21 young men over four weeks, two different doses of tribulus extract changed neither testosterone, nor androstenedione, nor luteinizing hormone, compared to placebo.

A systematic review published in 2014 reached the same conclusion: in humans, tribulus has not proven effective at raising testosterone. The increases observed in animals didn't hold up in men, except in studies where it was part of a mix of several ingredients, which makes it impossible to attribute the effect to tribulus alone.

A more recent review, published in 2025 and covering ten clinical trials, confirms the trend: eight out of ten studies reported no significant change in hormone profile. The two exceptions involved men with hypogonadism, meaning testosterone production that was already insufficient. That situation calls for a diagnosis and medical follow-up, not self-medication.

Promise #2: More Muscle and More Strength

Verdict: myth.

A study conducted with 22 elite rugby league players, followed over five weeks of preseason training, found no effect of tribulus on muscle strength or body composition, compared to placebo.

This is consistent with the above: if testosterone doesn't move, there's no reason to expect an anabolic effect.

Promise #3: Improve Erectile Function

Verdict: possible in some men, but low-level evidence.

This is the most interesting part. In the 2025 review, three of the five studies that measured erectile function with a validated questionnaire reported an improvement, in men with mild to moderate dysfunction, over a period of one to three months. A randomized trial published in 2017 involving 180 men notably observed a significant improvement in overall sexual function after 12 weeks, with no serious product-related side effects.

The review's authors nonetheless remain cautious and describe the level of evidence as low. Other trials found no difference from placebo.

An important reminder: erectile dysfunction can be an early signal of a cardiovascular or metabolic problem, such as diabetes. Before trying anything, an appointment with your doctor is essential.

Promise #4: Revive Desire in Women

Verdict: encouraging leads, very low certainty.

A systematic review published in 2020 pooled five randomized trials, totaling 279 pre- or postmenopausal women with reduced sexual desire. Women taking tribulus saw their sexual function scores improve after one to three months, compared to placebo. The authors nonetheless highlight very low certainty, due to the small size of the studies and their methodological limitations.

Promise #5: "It's Natural, So It's Safe"

Verdict: needs nuance.

At studied doses, tribulus is generally well tolerated. Reported side effects are mostly digestive: discomfort, nausea. A few isolated cases of serious effects have nonetheless been published, including a severe kidney injury in a young man who drank large amounts of tribulus water, and a case of gynecomastia. These cases remain rare and the cause-and-effect link isn't always established, but they're a reminder that an active plant is never harmless.

Health Canada's monograph warnings point in the same direction:

• consult a healthcare professional before use in case of pregnancy;
• a diuretic effect may occur;
• discontinue use in case of an allergic reaction;
• for traditional Chinese medicine products, do not use in case of hypotension or liver deficiency.

The Bottom Line at a Glance

Who Might Tribulus Make Sense For?

Tribulus can be worth discussing for an adult experiencing a drop in desire or mild erectile dysfunction, after consulting their doctor to rule out a medical cause, and who accepts trying an approach with modest, uncertain benefit.

It's less indicated, or best avoided:

• if your goal is to gain muscle or improve your athletic performance;
• if you suspect low testosterone, which deserves bloodwork rather than a supplement;
• during pregnancy;
• if you have hypotension or a liver condition;
• if you're already taking blood pressure medication or diuretics, without having spoken to your pharmacist, given the possible diuretic effect.

Reading a Tribulus Product Label Properly

We carry tribulus on its own and as part of certain formulas aimed at men. Whatever the product, here's what to check:

• The NPN. It confirms the product is authorized by Health Canada.
• The claim. On a product built on Health Canada's monograph, it will be traditional in nature. A promise of raised testosterone on a website or in an ad should raise a red flag.
• The plant part and preparation. Fruit or root, extract or powder: the monograph sets different doses depending on the preparation.
• Standardization. Some extracts list a saponin content. The 2017 trial mentioned above used precisely a standardized extract, and researchers have looked into composition differences between plants harvested in different regions.
• Combined formulas. A six-herb blend for men can have its logic, but it becomes impossible to know which one is doing the work.

Our article on how to recognize a good natural health product goes over the importance of the NPN and what to check on a label.

Better-Documented Approaches Depending on Your Goal

Want more muscle and strength? The basics have proven themselves: progressive resistance training and enough protein spread throughout the day. Our article The Protein Secret compares different protein sources, and our sports nutrition section brings together better-documented options, like creatine monohydrate and protein powders.

Targeting energy and libido? Sleep, weight management, alcohol consumption, and physical activity carry a lot of weight in the equation. A medical checkup can also verify hormone levels rather than guessing at them. Once that picture is established, it becomes much easier to choose a natural health product that fits.

The Final Verdict on Tribulus

Tribulus does not raise testosterone in healthy men and does not lead to muscle gains: on these two points, its reputation far outpaces the data. For mild erectile function and sexual desire, a few trials are favorable, but their level of evidence remains low. If you try it, do so after seeing your doctor, with a product carrying an NPN, and giving yourself an evaluation period of one to three months.

Would you like personalized advice before buying? Our licensed naturopaths offer consultations in the Gatineau area. They'll help you choose the approach that matches your actual goal, whether or not that involves tribulus.

References

1. Natural Health Products Ingredients Database, search Tribulus terrestris, monograph updated May 29, 2026. Health Canada. https://webprod.hc-sc.gc.ca/nhpid-bdipsn/
2. The aphrodisiac herb Tribulus terrestris does not influence the androgen production in young men. Neychev VK, Mitev VI., Journal of Ethnopharmacology. 2005. https://pubmed.ncbi.nlm.nih.gov/15994038/
3. The effect of five weeks of Tribulus terrestris supplementation on muscle strength and body composition in elite rugby league players. Rogerson S et al., Journal of Strength and Conditioning Research. 2007. https://pubmed.ncbi.nlm.nih.gov/17530942/
4. A systematic review on the herbal extract Tribulus terrestris and its putative aphrodisiac and performance enhancing effect. Qureshi A, Naughton DP, Petroczi A., Journal of Dietary Supplements. 2014. https://pubmed.ncbi.nlm.nih.gov/24559105/
5. Effects of Tribulus supplementation on erectile dysfunction and testosterone levels in men, a systematic review of clinical trials. Vilar Neto JO et al., Nutrients. 2025. https://www.mdpi.com/2072-6643/17/7/1275
6. Evaluation of the efficacy and safety of Tribulus terrestris in male sexual dysfunction. Kamenov Z et al., Maturitas. 2017. https://pubmed.ncbi.nlm.nih.gov/28364864/
7. Tribulus Terrestris for Female Sexual Dysfunction, a systematic review. Martimbianco ALC et al., Revista Brasileira de Ginecologia e Obstetricia. 2020. https://pmc.ncbi.nlm.nih.gov/articles/PMC10316844/
8. Tribulus terrestris-induced severe nephrotoxicity in a young healthy male. Talasaz AH et al., Nephrology Dialysis Transplantation. 2010. https://academic.oup.com/ndt/article-abstract/25/11/3792/1904302
9. Gynaecomastia and the plant product Tribulis terrestris. PubMed. https://pubmed.ncbi.nlm.nih.gov/15454201/