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Head-to-head evidence comparison — which supplement is right for you?
HMB wins 1 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
8 of 9 studies with measurable effects showed benefit.
Top outcomes
Verdict
Probably helps
6 of 10 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (3)
Outcomes where both EAAs and HMB have evidence — compare verdict strength side-by-side.
10-15g EAAs (containing 3-4g leucine)
Intra-workout, Post-workout, Between meals
Free-form EAA powder (instantized for mixing)
3g daily
Split into 1g doses 3x daily, Or all at once with a meal
HMB-Ca (calcium salt) capsules or powder
Acute (within hours)
24-72 hours
During caloric deficit
2-4 weeks
1-2 weeks
Peri-operative protein or amino acid supplementation for total joint arthroplasty: a systematic review and meta-analysis
Journal of orthopaedic surgery and research (2025) · Meta analysis · n=903
Essential amino acids (EAA) significantly reduced muscle atrophy in quadriceps femoris muscle mass (SMD: 0.69; 95% CI: 0.44 to 0.95) and hamstring muscle mass (SMD: 1.04; 95% CI: 0.52 to 1.55).
The Association of the Essential Amino Acids Lysine, Methionine, and Threonine with Clinical Outcomes in Patients at Nutritional Risk: Secondary Analysis of a Randomized Clinical Trial
Nutrients (2024) · Rct · n=237
In a model adjusted for comorbidities, sex, nutritional risk, and trial intervention, low plasma methionine levels were associated with 30-day mortality (adjusted HR 1.98 [95% CI 1.16 to 3.36], p = 0.01) and with a decline in functional status (adjusted OR 2.06 [95% CI 1.06 to 4.01], p = 0.03).
Exercise Programs Combined with Diet Supplementation Improve Body Composition and Physical Function in Older Adults with Sarcopenia: A Systematic Review
Nutrients (2023) · Systematic review · n=16
A total of 16 studies met the inclusion criteria and were included in this systematic review.
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.
Based on studies showing EAA supplementation increases MPS rates. Effect magnitude conservative given limited dose-response data. Requires adequate leucine content (3-4g). Individual response varies significantly.
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.
HMB has a higher evidence score (8/10 vs 7.5/10) and wins in 1 of 3 categories.
For build strength & muscle, EAAs has a higher relevance score (85 vs 70).
No known interactions between EAAs and HMB have been documented in our database. However, always consult a healthcare provider before combining supplements.