Supplement evidence

032 / 575Muscle support

HMB

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The short answer

May reduce muscle damage or support lean mass in selected untrained, older, or catabolic populations.

Evidence and scope: Mixed evidence
This status does not grade the ingredient for every goal, outcome, or person.
Important limitation: Benefits are inconsistent in trained adults and do not establish longevity effects.
Before deciding: Short-term studies suggest low risk, but product quality and long-term data remain limited.

01 / PRACTICAL GUIDE

Dose, absorption, and combinations

These are indication-specific reference or studied ranges—not a personalized prescription. Start with the objective, then check the form, label, medicines, and health conditions.

Reference range by objective

Strength and training3 g/day, usually divided

Reference or studied range—not a personalized prescription. The product label or a clinician may specify a different dose.

Dose source ↗

More is not automatically better. A clinician or product label may specify a different amount.

Absorption / solubilityWater-soluble

Water-soluble or readily water-dispersible. This does not mean excess is always harmless.

How it is commonly taken

Take consistently; benefits are most plausible in untrained, older, or catabolic populations.

Do not combine casually

Do not substitute it for adequate protein and resistance training.

Dose and use source ↗

Dose and use links lead to primary or official source material. Search links are discovery tools, not proof that every returned paper applies.

02 / EVIDENCE

What the research says

We keep supportive, mixed, negative, safety, and contextual findings together. The headline never replaces the underlying papers.

4research papers in this ledger

8unique primary studies represented

321unique participants represented

These are audited counts for this JIVANA collection, not search-result totals. Participants are counted once when multiple papers use the same cohort; review papers are not added again to participant totals.

Open the research timelineResearch timeline

Entries are ordered by publication year. A study period appears only when the source reports it.

2023

Mixed or qualifiedPMID 37248756 · ChiCTR2000028778

Effects of HMB Supplementation on Older Adults with Sarcopenia

HMB improved several strength and performance measures beyond exercise, but not skeletal muscle mass. The sample was small and the result needs replication.

Published: 2023Duration: 12 weeksn=34 participants

Study design and methods

Design: Randomized, double-blind, placebo-controlled trial
Population: 34 adults aged 60 or older with sarcopenia
Intervention: HMB or placebo twice daily; both groups performed resistance exercise twice weekly
Outcome: Grip strength, gait speed, chair stands, muscle quality, body composition, and inflammation

Funding or conflict note: The authors reported no commercial or financial conflict of interest.

Open research record ↗

2019

Does not support the tested claimPMID 31484462

Health Benefits of HMB Supplementation in Addition to Physical Exercise in Older Adults

Adding HMB to exercise had no or only very small effects on body composition, strength, or physical performance; cognition evidence was insufficient.

Published: 2019n=384 participants10 primary studies represented

Study design and methods

Design: Systematic review and meta-analysis of 10 randomized trials
Population: 384 adults aged 50–80
Intervention: HMB plus exercise versus exercise without HMB
Outcome: Body composition, strength, physical performance, and cognition

Funding or conflict note: Some trials overlap the earlier older-adult synthesis, so this review is excluded from aggregate totals. Authors declared no conflict of interest.

Open research record ↗

2019

Does not support the tested claimPMID 30360984

A double-blind placebo controlled trial into the impacts of HMB supplementation and exercise in older adults

Training increased strength and muscle thickness in both groups, with no clear added HMB effect on strength, mass, or protein synthesis between groups.

Published: 2019Duration: 6 weeksn=16 participants

Study design and methods

Design: Randomized, double-blind, placebo-controlled resistance-training trial
Population: 16 healthy older men
Intervention: HMB free acid 3 g/day or placebo during unilateral resistance training
Outcome: Muscle protein synthesis, thigh lean mass, muscle thickness, and strength

Funding or conflict note: One author was affiliated with Metabolic Technologies, Inc. The trial is represented in the 2019 exercise meta-analysis and is excluded from aggregate totals.

Open research record ↗

2015

Mixed or qualifiedPMID 26169182

Effect of beta-hydroxy-beta-methylbutyrate supplementation on muscle loss in older adults

HMB modestly favored muscle-mass preservation, without a fat-mass effect. The review could not establish improvements in strength or physical function.

Published: 2015n=287 participants7 primary studies represented

Study design and methods

Design: Systematic review and meta-analysis of seven randomized trials
Population: 287 adults aged 65 or older
Intervention: HMB-containing interventions versus control
Outcome: Muscle and fat mass

Open research record ↗

Unscreened discovery appendix—not evidence347 candidate publicationsSearch run: Aug 21, 2026

Complete for the displayed PubMed query at the search timestamp—not for all databases or every possible synonym. Candidates can be irrelevant, duplicate the same study, or report negative findings. They are never summed as evidence or participants until screened.

03 / SOURCES

Start with the source material

Official evidence overviewNIH Office of Dietary Supplements Live PubMed discovery searchNational Library of Medicine

The live search is for discovery only. Search-result counts change and are not included in the audited totals above.

Recent PubMed discovery recordsDirect links to the first 12 records returned by the reproducible search. These are discovery candidates—not reviewed summaries or a count of supportive findings.

04 / EXPERT CONTEXT

Expert context—not evidence

Expert positions are dated context—not scientific evidence. They never raise the evidence status or become consensus by repetition.

No direct, source-verified endorsement is currently recorded. Research authorship or discussion alone is not treated as endorsement.