Taking ashwagandha supplements while weight training helps men build more muscle strength - they could lift about 46 kg more on bench press vs 26 kg more with placebo
Evidence from Studies
Supporting (1)
Community contributions welcome
Examining the effect of Withania somnifera supplementation on muscle strength and recovery: a randomized controlled trial
This study gave men either ashwagandha pills (300mg twice daily) or fake pills while they did weight training for 8 weeks. The men taking ashwagandha gained about 46 kg on their bench press, while the men taking fake pills only gained about 26 kg - exactly matching what the claim says.
Contradicting (0)
Community contributions welcome
Score Breakdown
No multi-axis breakdown available yet. The overall Pro / Against score above is the best signal.
- No clinical evidence is available; the score reflects mechanistic plausibility only.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
Pooled effect size across multiple RCTs establishing overall efficacy and heterogeneity
Systematic review and meta-analysis of all double-blind RCTs examining ashwagandha supplementation (any dose) combined with resistance training in healthy adults, measuring 1RM strength as primary outcome, with subgroup analyses by dose, training status, and duration
Causal relationship between ashwagandha and strength gains with high internal validity
Multi-center double-blind RCT with 200+ participants per arm, ages 18-50, randomized to 300mg ashwagandha twice daily vs identical placebo for 12-16 weeks during supervised resistance training, measuring 1RM bench press and leg extension as co-primary outcomes
Real-world effectiveness and long-term outcomes in diverse populations
Prospective cohort following 500+ adults using ashwagandha for various durations during training, comparing to matched non-supplemented controls, measuring strength and adverse events over 6-12 months
Risk factors for adverse events or lack of response
Case-control study comparing 100 responders to 100 non-responders to identify demographic, genetic, or training factors predicting ashwagandha efficacy
Prevalence of use and associated characteristics
Cross-sectional survey of 1000+ athletes and gym-goers assessing ashwagandha use patterns, dosing, perceived effects, and side effects