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Head-to-head evidence comparison — which supplement is right for you?
BCAAs wins 1 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Probably helps
8 of 16 studies with measurable effects showed benefit.
Top outcomes
Verdict
Probably helps
10 of 16 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (2)
Outcomes where both BCAAs and HMB have evidence — compare verdict strength side-by-side.
5-10g per serving
Before fasted training, During long endurance sessions, Between meals
Powder (2:1:1 ratio)
3g daily
Split into 1g doses 3x daily, Or all at once with a meal
HMB-Ca (calcium salt) capsules or powder
24-72 hours post-exercise
During exercise
Ongoing
Immediate
4-8 weeks
N/A
1-2 weeks
Systematic review with meta-analysis: Branched-chain amino acid supplementation in liver disease
European journal of clinical investigation (2023) · Meta analysis · n=2308
According to meta-analyses, long-term (at least 6 months) BCAA supplementation in cirrhotic patients significantly improved event-free survival (p = .008; RR .61 95% CI .42-.88) and tended to improve overall survival (p = .05; RR .58 95% CI .34-1.00).
Branched-chain amino acids for people with hepatic encephalopathy
The Cochrane database of systematic reviews (2017) · Meta analysis · n=827
In a random-effects meta-analysis of mortality, we found no difference between BCAA and controls (risk ratio (RR) 0.88, 95% confidence interval (CI) 0.69 to 1.11; 760 participants; 15 trials; moderate quality of evidence).
Causal Relationship Between Branched-Chain Amino Acids and Hypertension: A Mendelian Randomization Study
Journal of the American Heart Association (2024) · Meta analysis · n=845
As suggested by the meta-analysis results, elevated BCAA levels were associated with a higher risk of hypertension (isoleucine: summary odds ratio, 1.26 [95% CI, 1.08-1.47]; leucine: summary odds ratio, 1.28 [95% CI, 1.07-1.52]; valine: summary odds ratio, 1.32 [95% CI, 1.12-1.57]).
Nutritional interventions for treating foot ulcers in people with diabetes
The Cochrane database of systematic reviews (2020) · Meta analysis · n=629
It is also uncertain whether arginine, glutamine and β-hydroxy-β-methylbutyrate supplement increases the proportion of ulcers healed at 16 weeks compared with placebo (RR 1.09, 95% CI 0.85 to 1.40).
β-Hydroxy-β-methylbutyrate and its impact on skeletal muscle mass and physical function in clinical practice: a systematic review and meta-analysis
The American journal of clinical nutrition (2019) · Meta analysis · n=2137
Effect sizes were small.
Dietary Supplementation on Physical Performance and Recovery in Active-Duty Military Personnel: A Systematic Review of Randomized and Quasi-Experimental Controlled Trials
Nutrients (2024) · Systematic review
Nutrition supplementation may have small benefits on muscle performance and recovery in warfighters.
Evidence limited to resistance training populations. Systematic review found negligible benefits on body composition in athletes. Benefits may be more apparent in caloric deficit or fasted states but data is limited.
Meta-analyses show small but significant effects on total body mass and fat-free mass. Effect sizes are consistently reported as 'small' (ES ~0.21-0.22). Multiple studies show no significant effects in older adults or sarcopenia patients. HMB-FA form may have superior bioavailability to HMB-Ca.
AI-estimated from published studies. Interpret as directional guidance.
BCAAs has a higher evidence score (6/10 vs 6/10) and wins in 1 of 3 categories.
For speed up recovery, HMB has a higher relevance score (75 vs 70).
No known interactions between BCAAs and HMB have been documented in our database. However, always consult a healthcare provider before combining supplements.