Tribulus
Tribulus Terrestris
A traditional herb marketed for testosterone and libido support, though research shows benefits primarily for libido and sexual function rather than testosterone levels.
Tribulus Terrestris is a flowering plant traditionally used in Ayurvedic and Chinese medicine for vitality and libido. Despite marketing claims, research does not support significant testosterone-boosting effects in healthy individuals. However, it does show consistent benefits for libido, sexual function, and may help with blood pressure and blood sugar. The active compounds include steroidal saponins, primarily protodioscin.
Mechanisms of Action
Libido Enhancement
Increases sexual desire
Nitric Oxide Support
May enhance NO production
Blood Sugar Support
May help regulate glucose
Recommended Dose
250-750mg daily (standardized to 45-60% saponins)
Loading: Not required
Optimal Timing
- With meals
- Morning or divided doses
Take with food
Best Form
Extract standardized to 45-60% saponins (protodioscin)
Alternatives: Whole herb powder (less potent)
Standardization to saponins/protodioscin content is important. Bulgarian-sourced tribulus is traditionally considered higher quality.
Duration
Minimum: 4 weeks
Optimal: 8 weeks
Cycling: 6-8 weeks on, 2-4 weeks off
Note: Take with food for better absorption. Consistent daily use for several weeks needed to see effects.
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Enhanced Libido
Increased sexual desire in both sexes
Sexual Function
Improved erectile function and arousal
No Testosterone Increase
Does not reliably increase testosterone
Good evidence for libido; don't expect testosterone changes
Who Should NOT Take This
- Hormone-sensitive conditions (theoretical)
Drug Interactions
May have additive hypotensive effects
May enhance blood sugar lowering
Possible Side Effects
Tip: Take with food
Tip: Avoid evening doses
Warnings
- Does NOT increase testosterone in healthy individuals
- Marketing often overstates benefits
- Quality varies significantly between products
Top studies from 40+ peer-reviewed papers
Vilar Neto JO et al. • Nutrients (2025)
“Conclusions: TT supplementation has a low level of evidence regarding its effectiveness in improving erectile function in men with erectile dysfunction, and no robust evidence was found for increasing testosterone levels.”
Key Findings:
- The Jadad score revealed low methodological quality for 50% of the studies.
- TT supplementation at doses of 400 to 750 mg/d for 1 to 3 months improved erectile dysfunction in 3 of the 5 studies that assessed this parameter.
- Eight out of ten studies did not report significant changes in androgen profile following TT supplementation, but the subjects in the neutral studies did not have low androgen levels at baseline.
- Therefore, only 2 studies showed significant intra-group increase in total testosterone levels, which had low clinical magnitude (60-70 ng/dL) and involved subjects with hypogonadism.
Petre GC et al. • Nutrients (2023)
“DSs marketed in Italy are usually blends of many substances that are frequently employed at a negligible dose or without any evidence.”
Key Findings:
- Based on the scoring system, 2 (8%) supplements matched with the cluster of higher expected efficacy, 3 (12%) with the lower efficacy cluster and 20 (80%) matched with the criterion of no expected efficacy.
- A systematic review of the literature was performed to evaluate the effect of DS and to detect the active ingredients able to improve erectile function-called effective ingredients (EIs)-and their minimal effective daily dose (mED).
- A metanalysis identified some nutraceuticals, such as Panax ginseng, Tribulus terrestris and L-arginine, that are able to improve male sexual function.
- DSs marketed in Italy are usually blends of many substances that are frequently employed at a negligible dose or without any evidence.
Sha'ari N et al. • Phytomedicine : international journal of phytotherapy and phytopharmacology (2021)
“Preliminary evidence suggests that Tribulus terrestris and Panax ginseng may be effective as alternative treatments for FSD in a clinical setting.”
Key Findings:
- Panax ginseng was found to be effective in treating sexual arousal (SMD = 0.54, 95% CI = 0.11 - 0.97, p = 0.014) and sexual desire (SMD = 0.59, 95% CI = 0.27 - 0.90, p < 0.001) compared to placebo.
- Preliminary evidence suggests that Tribulus terrestris and Panax ginseng may be effective as alternative treatments for FSD in a clinical setting.
- Further research warranted to confirm findings
Suharyani S et al. • International journal of impotence research (2026)
“The Author(s), under exclusive licence to Springer Nature Limited.”
Key Findings:
- The outcomes of continuous variables were aggregated into the mean difference (MD) with corresponding 95% confidence intervals (95% CI) utilizing random-effects models.
- Additionally, on both the IIEF-5 [MD 3.23 (95%CI 1.89, 4.58), p < 0.00001] and IIEF-15 [MD 14.44 (95%CI 5.75, 23.14), p = 0.001], Tribulus terrestris outperformed placebo.
- However, the two groups were not significantly different in terms of total testosterone levels.
- We observed no difference in the incidence of adverse events between Tribulus terrestris and placebo.
Morgado A et al. • International journal of impotence research (2024)
“The Author(s), under exclusive licence to Springer Nature Limited.”
Key Findings:
- Testosterone boosters are heavily marketed on social media and marketplaces to men with claims to significantly increase testosterone.
- Our findings indicate that most fail to increase total testosterone.
- The exceptions were β-hydroxy β-methylbutyrate and betaine, which can be considered effective for male athletes.
- The Author(s), under exclusive licence to Springer Nature Limited.
Study Type Distribution
Goals This Supplement Supports
Related Goals
This information is for educational purposes only and is not intended as medical advice. Always consult a qualified healthcare provider before starting any supplement.