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Head-to-head evidence comparison — which supplement is right for you?
Inositol vs Tribulus: Inositol has the stronger overall evidence (7 vs 5.5/10); they're alternatives for fertility support — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Inositol wins 3 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Probably helps
6 of 10 studies with measurable effects showed benefit.
Top outcomes
Verdict
Likely helps
3 of 3 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (2)
Outcomes where both Inositol and Tribulus have evidence — compare verdict strength side-by-side.
2-4g for general anxiety; 12-18g for OCD/panic
Divided into 2-3 doses, With or without food
Myo-inositol powder (most economical for higher doses)
250-750mg daily (standardized to 45-60% saponins)
With meals, Morning or divided doses
Extract standardized to 45-60% saponins (protodioscin)
4-6 weeks
6-12 weeks
3-6 months
First 1-2 weeks
2-4 weeks
4-8 weeks
N/A
Antenatal dietary supplementation with myo-inositol for preventing gestational diabetes
The Cochrane database of systematic reviews (2023) · Meta analysis · n=1319
For the primary neonatal outcomes, only one study measured the risk of a large-for-gestational-age infant and found myo-inositol was associated with both appreciable benefit and harm (RR 1.40, 95% CI 0.65 to 3.02; 1 study, 234 infants; low-certainty evidence).
Inositol Nutritional Supplementation for the Prevention of Gestational Diabetes Mellitus: A Systematic Review and Meta-Analysis of Randomized Controlled Trials
Nutrients (2022) · Meta analysis · n=1321
Pooled results were expressed as relative risk (RR) or mean difference (MD) with a 95% confidence interval (95% CI).
Antioxidants for female subfertility
The Cochrane database of systematic reviews (2020) · Meta analysis · n=7760
Due to the very low-quality of the evidence we are uncertain whether antioxidants improve live birth rate compared with placebo or no treatment/standard treatment (odds ratio (OR) 1.81, 95% confidence interval (CI) 1.36 to 2.43; P < 0.001, I2 = 29%; 13 RCTs, 1227 women).
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=483
10 studies (9 clinical trials and 1 study without a control) with 483 men in total, aged 16 to 70.
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
536 studies were identified and 20 met the criteria. The abstract gives no participant total.
Inositol has a higher evidence score (7/10 vs 5.5/10) and wins in 3 of 3 categories.
For fertility support, Inositol has a higher relevance score (92 vs 80).
No documented interaction was found in the data searched. This does not establish that this exact combination is safe.
Berberine, inositol, magnesium vs the cinnamon/chromium hype — and the med-interaction warning.
Selenium helps; iodine can WORSEN Hashimoto’s. The honest take on "thyroid support".
Folate is essential; inositol + CoQ10 are the best bets — but conception evidence is limited.
Inositol (40:1), and the supporting cast for insulin resistance, cycles & fertility.
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.