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Head-to-head evidence comparison — which supplement is right for you?
Ashwagandha wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
14 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 daily (standardized extract)
Morning for daytime stress, Evening for sleep support
KSM-66 or Sensoril standardized extract
250-750mg daily (standardized to 45-60% saponins)
With meals, Morning or divided doses
Extract standardized to 45-60% saponins (protodioscin)
2-4 weeks
2-4 weeks
2-4 weeks
First week
2-4 weeks
4-8 weeks
N/A
Effects of Ashwagandha (Withania Somnifera) on stress and anxiety: A systematic review and meta-analysis
Explore (NY) (2024) · Meta analysis · n=873
Significant effect on the Perceived Stress Scale (PSS) (MD = -4.72, 95 % CI = [-8.45 to -0.99]).
Effects of Withania somnifera Extract in Chronically Stressed Adults: A Randomized Controlled Trial
Nutrients (2024) · Rct · n=131
Our findings demonstrate the stress-reduction capabilities of this well-characterized aqueous extract of WS (root and leaf) at the low dose of 125 mg/day, in a dose-dependent manner, via the modulation of the HPA axis.
Plant-derived nootropics and human cognition: A systematic review
Critical reviews in food science and nutrition (2023) · Systematic review
Bacopa monnieri improves language, learning and memory.
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.
Based on meta-analysis showing significant HAM-A score reduction (p=0.0007) and RCT evidence at 125mg dose. High heterogeneity (I2=98%) in pooled analysis suggests variable response. Extract standardization affects bioavailability.
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.
Ashwagandha has a higher evidence score (7.5/10 vs 5.5/10) and wins in 2 of 3 categories.
For estrogen & progesterone balance, Tribulus has a higher relevance score (80 vs 70).
No known interactions between Ashwagandha and Tribulus have been documented in our database. However, always consult a healthcare provider before combining supplements.