Is Tribulus Terrestris Safe? Uses, Evidence, and Who Should Skip It

Tribulus terrestris shows up in more supplements than almost any other “testosterone booster” ingredient, and it’s one of the components in GenF20 Plus’s formula as well. It has a long history of traditional use and a reasonable amount of modern research behind it – but the research doesn’t always say what the marketing implies. Here’s an honest look at what it does, what it doesn’t, and the safety considerations worth knowing.

What Tribulus Terrestris Is

Tribulus terrestris, also called puncture vine or caltrop, is a flowering plant found across warm regions of Europe, Asia, Africa, and Australia. It’s a long-standing ingredient in Ayurvedic medicine and Traditional Chinese Medicine, traditionally used to support urinary health, vitality, and reproductive function ^[1]. Its active compounds are steroidal saponins, most notably protodioscin, and supplement quality varies considerably depending on how much of these compounds a given extract actually contains ^[1].

Does It Raise Testosterone? What the Evidence Actually Shows

This is the claim tribulus is best known for, and it’s also the claim the evidence supports the least. A 2025 systematic review of clinical trials in men found that 8 of 10 studies showed no significant change in androgen levels after tribulus supplementation; the two studies that did find a testosterone increase involved men who already had low testosterone (hypogonadism) at baseline, and even then the increases were modest ^[2].

Where the evidence is more encouraging is sexual function specifically, which is a related but distinct outcome from testosterone level itself. Randomized trials have shown improvements in sexual function scores in women, and at least one trial found a statistically significant improvement in erectile function scores in men, even without a corresponding rise in testosterone ^[2]. In other words: tribulus may help with sexual function for some people through a pathway that isn’t simply “more testosterone.”

Typical Dosing

Clinical trials on tribulus have used a fairly wide range, commonly 250 to 1,500 mg per day of standardized extract, typically split into two or three doses taken with food, with most sexual-health studies clustering around 750 to 1,500 mg per day ^[3]. GenF20 Plus includes 320 mg per serving, which falls within this range on the lower end – see our full ingredient dose comparison for how that compares to the rest of the formula.

Safety: What’s Worth Knowing

For most healthy adults, tribulus at typical doses is generally well tolerated, with mild stomach upset being the most commonly reported side effect ^[4]. But there’s a more serious side to the safety picture that doesn’t get much coverage:

• It can interact with statins and other medications. Tribulus is a moderate inhibitor of the CYP3A4 liver enzyme, which plays a central role in metabolizing a wide range of prescription drugs, including many statins. One case report describes a patient who developed rhabdomyolysis (serious muscle breakdown) after combining tribulus with a statin medication ^[5].
• Contamination and adulteration are a real, documented concern in this category. Because tribulus is marketed for the same audience as anabolic and testosterone-boosting products, some tribulus supplements have been found to contain undeclared steroids or hormones ^[4]. This is a product-quality issue rather than something inherent to the plant itself, but it matters for anyone drug-tested in competitive sports – a concern similar in spirit to the adulteration risk we cover on our deer antler velvet and sports-testing page.

Who Should Talk to a Doctor First

Based on the safety literature above, it’s worth checking with a healthcare provider before using tribulus if you:

• Are pregnant or nursing
• Have any history of liver or kidney conditions
• Have a hormone-sensitive condition
• Take statins, blood thinners, blood pressure medication, or diabetes medication
• Have diabetes or blood sugar regulation concerns
• Are subject to competitive drug testing of any kind

Where This Leaves You

Tribulus terrestris is a widely used, generally well-tolerated ingredient with a dosing range that GenF20 Plus’s formula falls within – but “generally well tolerated” isn’t the same as “risk-free for everyone,” and the testosterone-boosting claim it’s most often sold on is the part of its reputation the evidence supports the least. If sexual function support is your actual goal rather than testosterone specifically, the evidence is more favorable, particularly for women. For the complete picture of how this ingredient fits into the rest of the formula, see our full GenF20 Plus review or the ingredient dose comparison.

Frequently Asked Questions

Does Tribulus Terrestris actually raise testosterone?

In men with normal baseline testosterone, most clinical trials show no meaningful increase. A 2025 systematic review found 8 of 10 studies showed no significant androgen change; positive results were seen mainly in men who already had low testosterone.

What is Tribulus Terrestris actually good for, based on the evidence?

The more consistent evidence is for sexual function rather than testosterone itself, particularly in women, with multiple randomized trials showing improved sexual function scores. Evidence in men for erectile function is more limited but includes at least one positive randomized trial.

Is Tribulus Terrestris safe to take?

Generally well tolerated at typical doses for most healthy adults, with mild stomach upset the most common complaint. Rare but serious case reports of liver and kidney injury exist, and it can interact with statins and other CYP3A4-metabolized medications.

Who should avoid Tribulus Terrestris?

Anyone pregnant or nursing, with liver/kidney conditions, hormone-sensitive conditions, on statins or other CYP3A4-metabolized medications, or with diabetes should check with a doctor first. Competitive athletes should also be cautious due to documented adulteration in some products.

Sources

1. “Tribulus terrestris benefits, dosage, and side effects.” Examine.com
2. “Effects of Tribulus (Tribulus terrestris L.) Supplementation on Erectile Dysfunction and Testosterone Levels in Men – A Systematic Review of Clinical Trials.” PMC
3. “Tribulus Terrestris: Benefits, Dosage, and What the Research Says.” HealthFare
4. “Tribulus Terrestris Uses: Health Benefits and Side Effects.” WebMD
5. “Rhabdomyolysis Risk: The Dangers of Tribulus Terrestris, an Over-the-Counter Supplement.” American Journal of Case Reports. American Journal of Case Reports

This article is for informational and educational purposes only and is not medical advice. Consult a healthcare provider before starting Tribulus terrestris or any new supplement, particularly if you are pregnant, nursing, have a liver or kidney condition, take prescription medication, or have diabetes.