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Head-to-head evidence comparison — which supplement is right for you?
Tribulus wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
13 of 14 studies with measurable effects showed benefit.
Top outcomes
Verdict
Likely helps
4 of 4 studies with measurable effects showed benefit.
Top outcomes
300-600mg
On empty stomach for best absorption, 30-60 minutes before meals
R-Alpha Lipoic Acid (R-ALA) — the natural form
250-750mg daily (standardized to 45-60% saponins)
With meals, Morning or divided doses
Extract standardized to 45-60% saponins (protodioscin)
4-12 weeks
4-8 weeks
2-4 weeks
2-4 weeks
4-8 weeks
N/A
Effects of Oral Alpha-Lipoic Acid Treatment on Diabetic Polyneuropathy: A Meta-Analysis and Systematic Review
Nutrients (2023) · Meta analysis · n=1242
ALA treatment produced favorable results for TSS (a dose-related trend was observed), NDS, and the global satisfaction score.
Effects of selected dietary supplements on migraine prophylaxis: A systematic review and dose-response meta-analysis of randomized controlled trials
Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology (2025) · Meta analysis
In adults, compared with placebo, these supplements did not significantly affect other outcomes, and omega-3 supplementation did not yield a statistically significant reduction in any of these outcomes.
The Effect of Dietary Supplements on Male Infertility in Terms of Pregnancy, Live Birth, and Sperm Parameters: A Systematic Review and Meta-Analysis
Nutrients (2025) · Meta analysis · n=50
This study found no convincing evidence of an effect of any dietary supplements on male infertility.
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
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.
Based on multiple meta-analyses showing dose-related trends for TSS improvement. 600mg/day most studied dose with significant benefit vs placebo in 73% of studies. Limited data on doses above 600mg.
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.
AI-estimated from published studies. Interpret as directional guidance.
Tribulus has a higher evidence score (8.5/10 vs 9/10) and wins in 2 of 3 categories.
For fertility support, Alpha Lipoic Acid has a higher relevance score (85 vs 80).
No known interactions between Alpha Lipoic Acid and Tribulus have been documented in our database. However, always consult a healthcare provider before combining supplements.