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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 ~5-10mg (or ~0.2mg/kg) up to 1-2x daily; start at the lowest dose. Raw yohimbe bark is discouraged due to unpredictable content.
morning
Standardized yohimbine HCl (known dose)
2-4 weeks
2-4 weeks
2-4 weeks
First week
2-8 weeks
Acute
Acute
Throughout use
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
Yohimbine significantly more effective than placebo for ED
Erectile dysfunction.
BMJ clinical evidence (2011) · Review
Yohimbine has modest ED efficacy
Pharmacological interventions in primary or secondary male anorgasmia: A systematic review.
Actas urologicas espanolas (2025) · Systematic review
Yohimbine among agents assessed for anorgasmia
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 libido & male vitality, Ashwagandha has a higher relevance score (70 vs 68).
No known interactions between Ashwagandha and Yohimbe have been documented in our database. However, always consult a healthcare provider before combining supplements.