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Tribulus

What does the research say about Tribulus?

2 health outcomes synthesised

Tribulus has been studied for 2 health outcomes, with the strongest evidence supporting its use for increasing testosterone levels based on 4 studies. Clinical research primarily uses doses of 400–770 mg/day over 1–3 months, with effects mainly observed in clinical populations such as men with hypogonadism.

Strongest evidence:

  • Increased Testosterone Level: Moderate-strength evidence from 4 studies shows a small but consistent beneficial effect. The typical dose range is 400–770 mg/day over 1–3 months, with testosterone increases of about 60–70 ng/dL. Benefits were most evident in clinical populations (e.g., men with hypogonadism, people with sexual dysfunction) rather than healthy adults.

Mixed or weaker evidence:

  • Improved Erectile Function: Low-strength evidence from 3 studies is mixed. Two studies reported moderate benefits, but one high-quality meta-analysis found a neutral effect. The small evidence base and conflicting results mean conclusions remain preliminary.

Effective dose patterns:

  • The only outcome with a well-defined effective dose range is testosterone increase, at 400–770 mg/day. No consistent dose was identified for erectile function.

Population insights:

  • Across both outcomes, benefits are more consistently observed in clinical or subclinical populations (hypogonadal men, patients with erectile dysfunction) rather than healthy, athletic individuals.

Notable caveats:

  • Publication bias may overestimate benefits, especially for testosterone research. Most studies on testosterone did not specify the form of Tribulus used, limiting form-specific conclusions. For erectile function, the most robust study contradicts the positive direction seen in smaller studies.

Frequently asked

  • What is Tribulus good for according to research?
    Research shows Tribulus may increase testosterone levels, with moderate evidence from 4 studies showing small but consistent effects in clinical populations. Evidence for improved erectile function is weaker and mixed—2 of 3 studies found benefit, but a high-quality meta-analysis found a neutral effect.
  • What dose of Tribulus is typically used in studies?
    For testosterone outcomes, studies used 400–770 mg/day for 1–3 months. No consistent effective dose has been established for erectile function due to the limited evidence base.
  • Who benefits most from Tribulus?
    Benefits are most consistently seen in clinical populations, such as men with hypogonadism or people with sexual dysfunction. Healthy adults or athletes show less pronounced effects, and generalizability is limited.
  • Does Tribulus help with erectile function?
    Evidence is mixed and preliminary. While 2 of 3 studies reported moderate improvements, the highest-quality study (a meta-analysis) found no significant benefit. Overall, the evidence is low-strength and inconclusive.
  • Are there caveats or limitations in the research on Tribulus?
    Yes. Publication bias may inflate positive results, especially for testosterone. Most testosterone studies did not specify the form of Tribulus used. Effects are small and primarily observed in clinical subgroups, not healthy adults. For erectile function, the small number of studies and conflicting results limit confidence.
  • How strong is the evidence for Tribulus increasing testosterone?
    The evidence is moderate, based on 4 studies all showing benefit. However, effect sizes are small (60–70 ng/dL increases), and the results are less applicable to healthy adults without underlying hormonal issues.

Safety profile

4 studies reporting safety data

Across 4 clinical studies, no specific adverse events were quantitatively reported for Tribulus. In 4 studies, Tribulus was described as generally well tolerated, with one study noting no significant differences in adverse events between placebo and verum groups, and another reporting no serious adverse events. Safety parameters were found to be within normal limits, and one study concluded that Tribulus terrestris can be a safe alternative without side effects in the studied population.

Caveats: Evidence is limited to a small number of studies (≤4) and most were short-term; long-term safety not established. Studies were likely powered for efficacy rather than safety, so rare adverse events may not have been detected. Findings reflect specific forms and populations studied; safety in other groups (e.g., pregnant women, children) is not characterized.

Most-studied combinations with Tribulus

most supplement research is combination research
Also studied with:Maca (2), Panax Ginseng (2)

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