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Head-to-head evidence comparison — which supplement is right for you?
Ashwagandha wins 3 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
Mostly mechanism / observational
Top outcomes
300-600mg daily (standardized extract)
Morning for daytime stress, Evening for sleep support
KSM-66 or Sensoril standardized extract
Standardized yohimbine HCl ~0.2 mg/kg (roughly 5-15 mg) up to 1-2x daily; start at the lowest dose, ideally fasted for the fat-loss effect. Never combine with other stimulants.
morning
Standardized yohimbine HCl (known dose)
2-4 weeks
2-4 weeks
2-4 weeks
First week
3-8 weeks
2-8 weeks
Acute
Acute
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.
Yohimbine for erectile dysfunction: a systematic review and meta-analysis of randomized clinical trials.
The Journal of urology (1998) · Meta analysis
Meta-analysis of seven placebo-controlled RCTs of yohimbine monotherapy for erectile dysfunction
Yohimbine as a treatment for erectile dysfunction: A systematic review and meta-analysis.
Turkish journal of urology (2021) · Meta analysis
Systematic review and meta-analysis of eight RCTs comparing yohimbine to placebo for ED
Yohimbine: the effects on body composition and exercise performance in soccer players.
Research in sports medicine (2006) · Rct · n=20
Randomized placebo-controlled trial in 20 elite male soccer players, 20 mg/day for 21 days
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.
AI-estimated from published studies. Interpret as directional guidance.
Ashwagandha has a higher evidence score (7.5/10 vs 5/10) and wins in 3 of 3 categories.
For testosterone & cortisol balance, Ashwagandha has a higher relevance score (78 vs 42).
No known interactions between Ashwagandha and Yohimbine have been documented in our database. However, always consult a healthcare provider before combining supplements.