Home / Ingredient Directory / HMB

Reviewed by Yannis Lopez · Nutrition Industry Veteran

Last updated: July 6, 2026

Muscle & Performance Leucine Metabolite

HMB

Muscle preservation & recovery support

Metabolite of leucine

Popular during cutting phases

FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Always consult your physician before starting any supplement.

Overview

HMB (β-Hydroxy β-Methylbutyrate) is a metabolite of the essential amino acid leucine. It is produced naturally in small amounts in the body when leucine is metabolized. HMB has been studied extensively for its potential to support muscle preservation, reduce muscle breakdown, and enhance exercise recovery.

HMB is particularly popular among athletes in calorie deficits (cutting phases), older adults, and people recovering from injury. It works through different mechanisms than creatine, making it a complementary supplement for muscle health.

Potential Benefits

Muscle Preservation

May reduce muscle protein breakdown, especially during calorie restriction or intense training. Popular during cutting phases.

Exercise Recovery

May reduce exercise-induced muscle damage and soreness. Some studies show faster recovery between training sessions.

Strength & Lean Mass

When combined with resistance training, HMB may support gains in strength and lean muscle mass, especially in beginners or older adults.

Generally Well Tolerated

HMB is very safe with an excellent safety profile. Most people tolerate it well with minimal side effects.

Typical Dosage

Daily Dose

Often split into 3 doses of 1g each

Best Taken

With meals or post-workout

Consistent daily use is important for best results

Pro Tips

Stack with Creatine for synergistic effects
Especially useful during calorie deficits
Take consistently for 2–4 weeks to see benefits
HMB free acid form may absorb faster than calcium HMB

Research Snapshot

HMB has been studied extensively for its anti-catabolic (muscle-preserving) effects. The 2013 International Society of Sports Nutrition position stand concluded that HMB can attenuate exercise-induced muscle damage and support strength and muscle mass gains when combined with resistance training, with the most consistent benefits seen in untrained individuals and older adults.

Source: Wilson et al., J Int Soc Sports Nutr (2014)

How HMB Compares

Ingredient	Best For	Key Difference
HMB	Muscle Preservation, Recovery	Reduces muscle breakdown; leucine metabolite
Creatine	Strength, Power, Muscle	Increases ATP stores; most researched for strength
BCAAs	Muscle Recovery, Endurance	Branched-chain amino acids; muscle protein synthesis

HMB is often stacked with Creatine for comprehensive muscle support.

Popular Stacks with HMB

Muscle Preservation Stack

HMB + Creatine + Protein

Excellent during cutting phases

Strength Stack

HMB + Creatine + Beta-Alanine

Popular for strength training

Recovery Stack

HMB + Glutamine + Tart Cherry

Great for post-exercise recovery

Full stack recommendations coming soon in our Stacks section.

Frequently Asked Questions

How long until I see results?

Most studies show benefits after 2–4 weeks of consistent daily use. Some people notice reduced soreness within the first week.

Is HMB better than leucine or BCAAs?

HMB is more effective at reducing muscle breakdown than leucine or BCAAs alone. It is a downstream metabolite of leucine and works through different mechanisms.

Can I take HMB with creatine?

Yes. HMB and creatine work through complementary mechanisms and are often stacked together for enhanced muscle support. Research shows they can be safely combined.

Sources & References

1. Wilson JM, et al. International Society of Sports Nutrition position stand: beta-hydroxy-beta-methylbutyrate (HMB). J Int Soc Sports Nutr. 2014;11:38.

2. Nissen SL, et al. Effect of leucine metabolite beta-hydroxy-beta-methylbutyrate on muscle metabolism during resistance-exercise training. J Appl Physiol. 1996;81(5):2095–2104.

3. Rowlands DS, Thomson JS. Effects of beta-hydroxy-beta-methylbutyrate supplementation during resistance training on strength, body composition, and muscle damage in trained and untrained young men. J Strength Cond Res. 2009;23(3):836–846.

Related Ingredients

Creatine

Muscle preservation stack

BCAA

Recovery support

Whey Protein

Muscle protein synthesis

Beta-Alanine