Research vs Bro-science

Is HMB Really a Superior Muscle-Building Supplement to Creatine? The HMB Hype vs. Research

Published: 2026-06-30

Written by: Shingo YoshizakiReviewed by: Tomonobu Someda

HMB (beta-hydroxy-beta-methylbutyrate), a leucine metabolite, is marketed for stimulating muscle protein synthesis and preventing catabolism. But how well does the "guaranteed gains" claim hold up in research, especially for trained individuals?

Let the data settle it.

Round1

Is HMB effective for hypertrophy and strength gains in trained individuals?

What's said

HMBサプリメーカー・スポーツサプリ情報

HMB is more efficient than leucine for stimulating muscle protein synthesis and preventing catabolism. Experienced trainees see guaranteed gains in muscle mass and strength. Professionals use it.

What research says

Sanchez-Martinez et al.
(2018) meta-analysis found that HMB supplementation in trained and competitive athletes did not produce statistically significant hypertrophy or strength gains in most studies.
Where effects appeared, effect sizes were small.
Some evidence supports HMB for lean mass preservation in untrained individuals and older adults, but evidence for regular intermediate-to-advanced trainees is weak.
Industry-funded studies show a pattern of inflated effect sizes.

Verdict

HMB shows weak evidence for hypertrophy and strength gains in trained individuals. Some support for beginners and older adults. Creatine dominates in cost-effectiveness comparison.

Confidence:Mixed evidence

Effects of beta-hydroxy-beta-methylbutyrate supplementation on strength and body composition in trained and competitive athletes: A meta-analysis of randomized controlled trials Creatine supplementation augments gains in strength and lean mass from resistance training (meta-analysis)

Round2

Is HMB a better supplement than creatine?

What's said

HMBサプリ推奨記事・比較サプリ情報

HMB is creatine's superior — it increases protein synthesis AND prevents catabolism, while creatine only affects energy output. The higher cost is worth it.

What research says

Creatine monohydrate has the most consistent and well-replicated evidence for strength and lean mass gains of any sports supplement — endorsed as effective by the International Society of Sports Nutrition.
A month's supply of creatine (~5 g/day) costs a fraction of HMB.
When comparing evidence quality and cost-effectiveness, HMB does not surpass creatine.
Experienced trainees should prioritize creatine.

Verdict

HMB is inferior to creatine in both evidence quality and cost-effectiveness. There's no evidence-based reason to choose HMB before creatine.

Confidence:Strong evidence