Top 6 Best HMB Supplements for Muscle Gain (2026)
01 · Best Overall✓ Label verified · Supplement Facts read Oct 11, 2026Best Overall: NutraBio HMB 1,000 mg
The only label here that prints the trial routine: 1 g three times a day with meals. Vegetable capsules with nothing else in them, and a lookup for independent lab results printed on the bottle.
$21.99 · 120 capsules (Amazon US, Oct 11, 2026)$1.10 per day at 3 g (6 capsules)
Why it wins: all five scores, pros & cons, full label
- Label gives 3 g a day in three doses
- Vegetable capsule with no excipients
- Lookup for independent lab results printed on the label
- Form stated on the panel
- Six capsules a day
- A bottle lasts 20 days at 3 g
- $1.10 a day, mid-range
- Not NSF Certified for Sport
- Cost per day at 3 g
- $1.10 (bottle lasts 20 days)
- Directions
- 1 serving (2 capsules) 3 times daily with meals
- Daily dose as labelled
- 3 g
- Form
- Calcium HMB monohydrate, vegetable capsule
- Serving
- 2 capsules (1,000 mg)
- Count
- 120 capsules (60 servings)
- Other ingredients
- Vegetable capsule (hypromellose, water)
- Testing
- Label prints a lookup for independent lab results; GMP and FDA-inspected facility
- Price
- $21.99 for 120 capsules (Amazon US, Oct 11, 2026)
Our take — If you want to try HMB as it was tested, this bottle saves you the arithmetic: two capsules with each of three meals. The capsule is as clean as they come. It costs about a dollar a day, and the honest expectation is a small benefit if you are new to training or returning from a layoff, and little if you already lift regularly.
Who Wins Which Aspect
Sorted by overall SAC Product Score™ — the official ranking.
| # | Pick | Score | Dose vs the Trials30% | Form & Label Clarity20% | Testing & Manufacturing20% | Formula & Capsule15% | Value15% | Cost Per Dose | Buy |
|---|---|---|---|---|---|---|---|---|---|
| 01 | | 8.9 | 10.01 | 8.53 | 8.51 | 10.01 | 6.53 | $1.10 | Check price |
| Label gives 3 g a day in three dosesSix capsules a day | |||||||||
| 02 |  | 8.7 | 7.0 | 10.01 | 8.51 | 9.02 | 10.01 | $0.28 | Check price |
| HMB content printed: 825 mg per gram of powderLabel serving is 1 g; you take it three times | |||||||||
| 03 |  | 8.1 | 7.0 | 8.53 | 8.51 | 8.0 | 9.02 | $0.50 | Check price |
| $0.50 a day at 3 gLabel dose is 1.5 g a day | |||||||||
| 04 |  | 7.9 | 9.03 | 8.0 | 7.52 | 8.53 | 5.5 | $1.33 | Check price |
| Full 3 g in one three-capsule serving$1.33 a day | |||||||||
| 05 |  | 7.8 | 6.5 | 8.53 | 8.51 | 7.5 | 9.02 | $0.50 | Check price |
| $0.50 a day at 3 gLabel dose is 1 g a day | |||||||||
| 06 |  | 7.7 | 9.52 | 9.02 | 7.52 | 7.0 | 3.0 | $2.34 | Check price |
| 3 g of HMB a day as labelled, in three doses$2.34 a day | |||||||||
The Other 5, Ranked
- 02
Best Budget Powder: BulkSupplements HMB Powder 250 g
8.7SAC Score™The only panel that prints how much HMB the calcium salt delivers: 825 mg per gram. No other ingredients, and $0.28 a day at 3 g. You measure it yourself, three times a day.
StrongestForm & Label Clarity10.01WeakestDose vs the Trials7.0- Per serving
- HMB 825 mg · calcium 155 mg
- Cost per day at 3 g
- $0.28 (bag lasts 83 days)
- Directions
- 1/2 tsp with 8-12 oz of water
All five scores, pros & cons, full label
What We Like- HMB content printed: 825 mg per gram of powder
- No other ingredients
- $0.28 a day at 3 g
- A bag lasts 83 days
What You Live With- Label serving is 1 g; you take it three times
- Approximate teaspoon measure
- Bitter loose powder
- Not NSF Certified for Sport
- Form
- Calcium HMB monohydrate powder
- Serving
- 1/2 tsp (about 1 g)
- Count
- 250 g (250 servings)
- Other ingredients
- None
- Testing
- Listing states third-party tested and cGMP
- Price
- $22.97 for 250 g (Amazon US, Oct 11, 2026)
Our take — If a scoop and a glass of water three times a day do not bother you, this bag gives you studied-dose HMB for less than thirty cents a day, with the most honest panel on the list. If you want capsules and printed directions, pay more for NutraBio.
- 03
Best Low-Cost Capsule: Bucked Up HMB 1,500 mg
8.1SAC Score™The cheapest capsule per day: 1,500 mg of calcium HMB per three capsules for $14.95 a bottle. The label says three capsules daily, which is half the studied dose.
StrongestValue9.02WeakestDose vs the Trials7.0- Per serving
- Calcium HMB monohydrate 1,500 mg · calcium 210 mg
- Cost per day at 3 g
- $0.50 (bottle lasts 30 days)
- Directions
- 3 capsules daily with 8-12 oz of water
All five scores, pros & cons, full label
What We Like- $0.50 a day at 3 g
- Third-party testing stated on the label
- Two excipients
- Calcium amount printed
What You Live With- Label dose is 1.5 g a day
- Six capsules a day for 3 g
- Gelatin capsule
- Not NSF Certified for Sport
- Form
- Calcium HMB monohydrate, gelatin capsule
- Serving
- 3 capsules (1,500 mg)
- Count
- 180 capsules (60 servings)
- Daily dose as labelled
- 1.5 g
- Other ingredients
- Gelatin capsule, magnesium stearate (vegetable source), microcrystalline cellulose
- Testing
- 'Third party tested' and GMP certified printed on the label
- Price
- $14.95 for 180 capsules (Amazon US, Oct 11, 2026)
Our take — Bucked Up gives you inexpensive, plainly made HMB capsules with a testing statement. Ignore the three-a-day direction if you want the studied dose and take two capsules with each of three meals.
- 04
Best Known Brand: Optimum Nutrition HMB 1,000 mg Capsules
7.9SAC Score™3 g of calcium HMB in one three-capsule serving from the best-known brand on the list. No testing statement on the label, and $1.33 a day.
StrongestDose vs the Trials9.03WeakestValue5.5- Per serving
- Calcium HMB monohydrate 3 g · calcium 360 mg · 15 calories
- Cost per day at 3 g
- $1.33 (bottle lasts 30 days)
- Directions
- Take 3 capsules
All five scores, pros & cons, full label
What We Like- Full 3 g in one three-capsule serving
- Calcium amount printed
- Two other ingredients
- Sold by Amazon directly
What You Live With- $1.33 a day
- No testing statement on the label
- Garbled ingredient name on the panel
- Gelatin capsule
- Form
- Calcium HMB monohydrate, gelatin capsule
- Serving
- 3 capsules (3 g)
- Count
- 90 capsules (30 servings)
- Daily dose as labelled
- 3 g
- Other ingredients
- Gelatin, magnesium stearate
- Testing
- No third-party testing statement on the label or listing
- Price
- $39.99 for 90 capsules (Amazon US, Oct 11, 2026)
Our take — Optimum Nutrition makes HMB easy: three capsules, 3 g. It ranks fourth because nothing on the label addresses testing and you pay well over twice the cost per day of the budget capsules for the same compound.
- 05
Biggest Bottle: Nutricost HMB 1,000 mg 240 Capsules
7.8SAC Score™240 capsules for $19.95 with a third-party testing statement. The label says two capsules a day, which is 1 g, a third of the studied dose.
StrongestValue9.02WeakestDose vs the Trials6.5- Per serving
- Calcium HMB monohydrate 1,000 mg · calcium 140 mg
- Cost per day at 3 g
- $0.50 (bottle lasts 40 days)
- Directions
- 2 capsules daily with 8-12 oz of water
All five scores, pros & cons, full label
What We Like- $0.50 a day at 3 g
- 40 days per bottle at the full dose
- Third-party testing stated on the label
- Calcium amount printed
What You Live With- Label dose is 1 g a day
- Six capsules a day for 3 g
- Six excipients
- Gelatin capsule
- Form
- Calcium HMB monohydrate, gelatin capsule
- Serving
- 2 capsules (1,000 mg)
- Count
- 240 capsules (120 servings)
- Daily dose as labelled
- 1 g
- Other ingredients
- Gelatin capsule, organic flow agent blend (rice hull concentrate, sunflower lecithin, oat fiber, gum arabic), silica, magnesium stearate (vegetable source)
- Testing
- 'Third party tested' printed on the label; GMP facility seal
- Price
- $19.95 for 240 capsules (Amazon US, Oct 11, 2026)
Our take — Nutricost's big bottle is a fair buy if you take it as the studies did, two capsules three times a day. As labelled it gives a third of that, which is why it sits fifth.
- 06
Best Premium Free-Acid HMB: MuscleTech Clear Muscle HMB Free Acid 42 Softgels
7.7SAC Score™The free-acid form of HMB, 1,000 mg per softgel, taken three times a day. The listing leans on one 12-week study whose results later trials did not reproduce, and it costs $2.34 a day.
StrongestDose vs the Trials9.52WeakestValue3.0- Per serving
- HMB free acid 1,000 mg · betaine anhydrous 250 mg
- Cost per day at 3 g
- $2.34 (bottle lasts 14 days)
- Directions
- 1 softgel 3 times daily
All five scores, pros & cons, full label
What We Like- 3 g of HMB a day as labelled, in three doses
- Free-acid form, amount of HMB itself stated
- One softgel per dose
- Sold by Amazon directly
What You Live With- $2.34 a day
- A bottle lasts 14 days
- Marketing rests on one outlier study
- Carrageenan and sorbitol in the softgel
- No testing statement
- Form
- HMB free acid (BetaTOR), liquid softgel
- Serving
- 1 softgel
- Count
- 42 softgels
- Daily dose as labelled
- 3 g
- Other ingredients
- Glycerin, modified food starch, carrageenan, sorbitol, purified water, natural flavors; contains coconut ingredients
- Testing
- No third-party testing statement on the label or listing
- Price
- $32.75 for 42 softgels (Amazon US, Oct 11, 2026)
Our take — Clear Muscle labels and doses its HMB correctly and is the only free-acid option here. No trial shows the free acid beating the calcium salt, and the headline result on the listing has not been reproduced. For the same 3 g a day, NutraBio costs less than half and BulkSupplements about an eighth.
Muscle Growth In Four Short Lessons
The dose is 3 g a day, in three doses.
The position stand puts it at about 38 mg per kg of body weight a day, taken as 1 g three times (Wilson 2013). Three of the six labels here direct less: 1 g, 1.5 g or one unsplit serving. Check the directions, not the number on the front.
Know what the salt weight means.
Most HMB is sold as calcium HMB monohydrate, which is about four fifths HMB. 3 g of the salt gives roughly 2.5 g of HMB and around 400 mg of calcium. Only the free acid is 100% HMB, and it costs several times more.
Expect little if you already train.
Small strength gains in untrained lifters, trivial effects in trained ones (Rowlands 2009; Sanchez-Martinez 2018; Jakubowski 2020). HMB makes the most sense at the start of a programme, after a layoff or in a hard calorie deficit.
Wilson 2013 (PMID 23374455); Nissen 1996 (PMID 8941534); Rowlands 2009 (PMID 19387395); Sanchez-Martinez 2018 (PMID 29249685); Jakubowski 2020 (PMID 32456217).
Every product here contains the same compound, so the ranking turns on the label. The largest share of the score, 30 percent, asks whether a serving and its directions reproduce the trials: about 3 g a day, usually in three 1 g doses (Wilson 2013). Form and label clarity follow at 20 percent: calcium HMB monohydrate is about four fifths HMB by weight, and only one panel prints that split. Testing is read from the label and the listing, and we searched NSF's Certified for Sport database for all six on Oct 11, 2026; none is listed. Formula covers the capsule and excipients. Value is the cost of a day at 3 g at the featured Amazon US price on Oct 11, 2026. Every number we cite was read from the product's own Supplement Facts photo. We did not buy or take these products.
Dose vs the Trials · 30%
The trials gave about 3 g of HMB a day (38 mg per kg of body weight), usually as 1 g three times a day (Wilson 2013); the first trial compared 1.5 g and 3 g (Nissen 1996). We scored how closely a label serving and its directions reproduce that. A label that says 1 g once a day leaves you at a third of the studied dose unless you triple it yourself.
Form & Label Clarity · 20%
HMB is sold as the calcium salt (calcium HMB monohydrate) or as the free acid. A label scores highest when it says which form it is and prints how much HMB the serving contains, because 1 g of the calcium salt holds about 0.8 g of HMB. A panel that prints only the salt weight scores lower; a garbled ingredient name scores lower still.
Testing & Manufacturing · 20%
Third-party testing and manufacturing statements, read from the label and the listing gallery, and a search of NSF's Certified for Sport database. A printed lookup for independent lab results or a third-party testing statement scores 8.5; nothing printed scores 7.5. None of the six is NSF Certified for Sport.
Formula & Capsule · 15%
What surrounds the HMB: a vegetable capsule beats gelatin, no excipients beat six, and added ingredients below a useful dose cost points. Loose powder has the cleanest ingredient line but has to be measured.
Value · 15%
Cost per day at 3 g, the studied dose, at the featured Amazon US price on Oct 11, 2026. Where the label serving is smaller we count the capsules it takes to reach 3 g.
How HMB Works
- 1
The body makes it from leucine
HMB is a metabolite of leucine. Only a small part of the leucine you eat is converted, which is the argument for taking HMB directly.
- 2
It slows muscle protein breakdown
In the first trial HMB lowered urinary 3-methylhistidine and plasma creatine kinase, both markers of muscle damage, during the first weeks of a new lifting programme (Nissen 1996).
- 3
It may add to protein synthesis
The position stand lists two mechanisms: less protein breakdown and more protein synthesis (Wilson 2013).
- 4
The effect fades with training
Meta-analyses find small strength benefits in untrained lifters and trivial ones in trained lifters (Rowlands 2009; Sanchez-Martinez 2018). A muscle used to training is damaged less, which leaves HMB less to do.
What to Expect From HMB
Loading
The position stand finds HMB most effective when taken for two weeks before a hard bout (Wilson 2013). Take 3 g a day in three doses with meals.
Where the first trial measured
In the three-week trial, markers of muscle breakdown were lower and the weight lifted was higher with 1.5 g and 3 g a day (Nissen 1996). The subjects were starting a new programme.
Trained lifters see little
Across trials of five to twelve weeks, effects on strength and fat-free mass in trained lifters were trivial (Rowlands 2009; Sanchez-Martinez 2018; Jakubowski 2020).
Decide by your own log
If soreness and training volume have not changed after a month, the money is better spent on protein and creatine.
The bottom line
NutraBio is the reference HMB.
1 g three times a day with meals, printed on the label, in a vegetable capsule with no excipients and a lookup for independent lab results.
The powder is the value play.
BulkSupplements costs $0.28 a day at 3 g and is the only panel that prints the HMB content: 825 mg per gram of the calcium salt.
Three labels under-dose.
Nutricost directs 1 g a day and Bucked Up 1.5 g. Both are sound products at six capsules a day; as labelled they give a third and a half of the studied dose.
The free acid is not worth four times the price.
MuscleTech Clear Muscle doses correctly, and no trial shows the free acid beating the calcium salt. Its headline result comes from one study later work did not reproduce.
Quick Answers
What is the best muscle growth pick overall?
NutraBio HMB 1,000 mg by NutraBio is our #1 pick (SAC score 8.9/10). If you want to try HMB as it was tested, this bottle saves you the arithmetic: two capsules with each of three meals. The capsule is as clean as they come. It costs about a dollar a day, and the honest expectation is a small benefit if you are new to training or returning from a layoff, and little if you already lift regularly.
What is the best budget option?
BulkSupplements HMB Powder 250 g at $22.97 · 250 g (Amazon US, Oct 11, 2026). If a scoop and a glass of water three times a day do not bother you, this bag gives you studied-dose HMB for less than thirty cents a day, with the most honest panel on the list. If you want capsules and printed directions, pay more for NutraBio.
How much do these picks cost?
Across our ranked picks, prices run from about $14.95 to $39.99 — exact price and cost per serving are listed on every pick card above.
How were these picks ranked?
Every product here contains the same compound, so the ranking turns on the label. The largest share of the score, 30 percent, asks whether a serving and its directions reproduce the trials: about 3 g a day, usually in three 1 g doses (Wilson 2013). Form and label clarity follow at 20 percent: calcium HMB monohydrate is about four fifths HMB by weight, and only one panel prints that split. Testing is read from the label and the listing, and we searched NSF's Certified for Sport database for all six on Oct 11, 2026; none is listed. Formula covers the capsule and excipients. Value is the cost of a day at 3 g at the featured Amazon US price on Oct 11, 2026. Every number we cite was read from the product's own Supplement Facts photo. We did not buy or take these products.
Every Claim Ranked Above Traces Back To One Of These
7 peer-reviewed sources, each linked to PubMed
- [1] Wilson JM, et al. J Int Soc Sports Nutr. 2013;10(1):6. PMID 23374455 — International Society of Sports Nutrition Position Stand: beta-hydroxy-beta-methylbutyrate (HMB). The ISSN position stand concludes that about 38 mg of HMB per kg of body weight a day, taken close to training and for two weeks before a hard bout, can reduce muscle damage and aid recovery; that calcium HMB and HMB free acid have both been used, with too little research to call one superior; and that long-term use is safe.
- [2] Nissen S, et al. J Appl Physiol (1985). 1996;81(5):2095-104. PMID 8941534 — Effect of leucine metabolite beta-hydroxy-beta-methylbutyrate on muscle metabolism during resistance-exercise training. In 41 subjects lifting three days a week for three weeks, 1.5 g or 3 g of HMB a day lowered urinary 3-methylhistidine and plasma creatine kinase and raised the weight lifted in a dose-dependent way; in a second seven-week study 3 g a day increased fat-free mass at several time points.
- [3] Rowlands DS, Thomson JS. J Strength Cond Res. 2009;23(3):836-46. PMID 19387395 — Effects of beta-hydroxy-beta-methylbutyrate supplementation during resistance training on strength, body composition, and muscle damage in trained and untrained young men: a meta-analysis. A meta-analysis of nine studies with 394 subjects found small strength benefits in untrained lifters (lower body 9.9%, average 6.6%), trivial strength effects in trained lifters, trivial effects on fat and fat-free mass, and unclear results for creatine kinase.
- [4] Sanchez-Martinez J, et al. J Sci Med Sport. 2018;21(7):727-735. PMID 29249685 — Effects of beta-hydroxy-beta-methylbutyrate supplementation on strength and body composition in trained and competitive athletes: A meta-analysis of randomized controlled trials. A meta-analysis of six randomized trials in 193 trained and competitive athletes found trivial, non-significant effects of HMB on bench press, leg press, body mass, fat-free mass and fat mass.
- [5] Jakubowski JS, et al. Nutrients. 2020;12(5):1523. PMID 32456217 — Supplementation with the Leucine Metabolite β-hydroxy-β-methylbutyrate (HMB) does not Improve Resistance Exercise-Induced Changes in Body Composition or Strength in Young Subjects: A Systematic Review and Meta-Analysis. A systematic review and meta-analysis of resistance-training trials in adults aged 18 to 45 found a significant effect of HMB on total body mass and no significant effect on fat-free mass, fat mass or strength.
- [6] Jakubowski JS, et al. Med Sci Sports Exerc. 2019;51(1):65-74. PMID 30113522 — Equivalent Hypertrophy and Strength Gains in β-Hydroxy-β-Methylbutyrate- or Leucine-supplemented Men. In 26 resistance-trained men over 12 weeks, whey protein plus 3 g of HMB a day produced the same gains in muscle size and strength as whey protein plus 3 g of leucine a day.
- [7] Wilson JM, et al. Eur J Appl Physiol. 2014;114(6):1217-27. PMID 24599749 — The effects of 12 weeks of beta-hydroxy-beta-methylbutyrate free acid supplementation on muscle mass, strength, and power in resistance-trained individuals: a randomized, double-blind, placebo-controlled study. A 12-week trial in resistance-trained individuals reported a lean body mass gain of 7.4 kg with HMB free acid against 2.1 kg with placebo and a larger increase in total strength; results of this size have not been reproduced by later trials.
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