Best for Muscle
Best HMB for Muscle
Top 3 products ranked · Reviewed May 2026 · 1000–1500 mg clinical dose
Why HMB for Muscle
HMB plays a supporting role in muscle. Meta-analyses (Nissen & Sharp 2003, Wu et al. 2015) demonstrate benefits for lean mass preservation, particularly in untrained individuals and older adults. In clinical studies, hmb supports lean muscle mass preservation (meta-analysis).
What dose to look for
Clinical studies typically use 1000–1500 mg of hmb. Per-dose range: 1–1.5 g (daily total 3 g split across 3 doses). Most capsule products deliver 1 g/serving. Both calcium HMB and free acid forms studied; free acid may have faster absorption. Products below this range may not deliver meaningful results.
What the research says
HMB has moderate clinical evidence for muscle benefits. Meta-analyses demonstrate lean mass preservation benefits, especially in untrained and older adults Learn more
Clinical research on HMB (Beta-Hydroxy Beta-Methylbutyrate)
MODERATE — Meta-analysis supports benefit, primarily in untrained individuals and older adults · 3 g/day (as calcium HMB or free acid form)
- •Nissen & Sharp (2003) meta-analysis of 9 RCTs found HMB supplementation (3 g/day) increased lean mass gains by 0.28 kg and strength by 1.4% per week during resistance training. PubMed
- •2015 systematic review of 7 RCTs found HMB most effective in untrained individuals and older adults beginning resistance training. Benefits in trained athletes were minimal or absent. PubMed
- •HMB is a leucine metabolite (~5% of leucine is converted to HMB). Anti-catabolic mechanism: reduces muscle protein breakdown via ubiquitin-proteasome pathway inhibition. More useful for preventing muscle loss than building new muscle in trained populations.
- •Honest limitation: some highly positive HMB studies (Wilson et al. 2014) reported implausibly large effects and have been questioned by the scientific community. The average benefit in trained athletes is likely small to negligible.