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Head-to-head evidence comparison — which supplement is right for you?
Tribulus vs Vitex: Vitex has the stronger overall evidence (7 vs 5.5/10); they're alternatives for testosterone & cortisol balance — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Vitex wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
4 of 4 studies with measurable effects showed benefit.
Top outcomes
Verdict
Likely helps
11 of 12 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (1)
Outcomes where both Tribulus and Vitex have evidence — compare verdict strength side-by-side.
250-750mg daily (standardized to 45-60% saponins)
With meals, Morning or divided doses
Extract standardized to 45-60% saponins (protodioscin)
20-40mg extract (standardized to 0.5% agnuside)
Morning, Consistently at same time daily
Standardized extract (0.5% agnuside or 0.6% aucubin)
and 1 more not shown
2-4 weeks
4-8 weeks
N/A
1-3 cycles
2-3 cycles
1-2 cycles
Effects of Tribulus (Tribulus terrestris L.) Supplementation on Erectile Dysfunction and Testosterone Levels in Men-A Systematic Review of Clinical Trials
Nutrients (2025) · Systematic review · n=172
The Jadad score revealed low methodological quality for 50% of the studies.
Dietary Supplements for Erectile Dysfunction: Analysis of Marketed Products, Systematic Review, Meta-Analysis and Rational Use
Nutrients (2023) · Meta analysis
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.
Beneficial effects of natural products on female sexual dysfunction: A systematic review and meta-analysis
Phytomedicine : international journal of phytotherapy and phytopharmacology (2021) · Meta analysis · n=536
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) compared to placebo.
Vitex agnus-castus in premenstrual syndrome: A meta-analysis of double-blind randomised controlled trials
Complementary Therapies in Medicine (2019) · Meta analysis · n=1878
Vitex significantly reduced overall PMS symptom scores vs placebo
Herbal medicine for depression and anxiety: A systematic review with assessment of potential psycho-oncologic relevance
Phytotherapy research : PTR (2018) · Systematic review
Overall, 45% of studies reported positive findings with fewer adverse effects compared with conventional medications.
A Critical Approach to Evaluating Clinical Efficacy, Adverse Events and Drug Interactions of Herbal Remedies
Phytotherapy research : PTR (2016) · Meta analysis
A critical evaluation of the clinical data regarding the adverse effects has shown that herbal remedies are generally better tolerated than synthetic medications.
Based on systematic review showing improvement in 3 of 5 studies at 400-750mg doses. Studies had low methodological quality (50% low Jadad scores). Effects primarily in men with existing ED.
Based on meta-analysis of RCTs showing large effect size. Most effective for irritability, mood swings, and breast tenderness. Standardized extracts (Ze 440, BNO 1095) had strongest evidence. High heterogeneity noted between studies.
AI-estimated from published studies. Interpret as directional guidance.
Vitex has a higher evidence score (7/10 vs 5.5/10) and wins in 2 of 3 categories.
For testosterone & cortisol balance, Vitex has a higher relevance score (92 vs 48).
No known interactions between Tribulus and Vitex have been documented in our database. However, always consult a healthcare provider before combining supplements.
Mostly hype unless you’re deficient — what has modest evidence vs what doesn’t, and when to see a doctor.
The transition years (40s): cycle changes, mood, sleep, brain fog — foundations, vitex, and starting muscle work early.
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.