The Claim

Withania somnifera supplementation at 300mg administered twice daily for 8 weeks produces a statistically significant increase in leg extension muscle strength of 14.5 kg (95% CI: 10.8-18.2) compared to placebo which shows 9.8 kg improvement (95% CI: 7.2-12.3), with p=0.04, in healthy young untrained males participating in resistance training programs.

Source: Examining the effect of Withania somnifera supplementation on muscle strength and recovery: a randomized controlled trial

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
68score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Quantitative
1 study reviewed
In plain English

Taking ashwagandha supplements (300mg twice daily for 8 weeks) helps young men build more leg muscle strength during weight training compared to taking a placebo pill - about 14.5 kg more strength gain versus 9.8 kg with placebo.

See the scientific wording

Withania somnifera supplementation (300mg twice daily for 8 weeks) significantly increases leg extension muscle strength by 14.5 kg (95% CI: 10.8, 18.2) compared to 9.8 kg (95% CI: 7.2, 12.3) in placebo (p=0.04) in healthy young untrained males undergoing resistance training

What the research says

1 study
  1. Study: Examining the effect of Withania somnifera supplementation on muscle strength and recovery: a randomized controlled trial

    The study directly confirms the claim - men taking 300mg ashwagandha twice daily for 8 weeks gained 14.5 kg in leg extension strength versus 9.8 kg for those taking placebo, exactly as stated in the claim.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

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