HMB (β-hydroxy β-methylbutyrate) is a metabolite of the amino acid leucine, produced naturally in the body in small amounts. As a supplement, it's used primarily for reducing muscle protein breakdown and supporting lean body mass — particularly during periods of muscle stress like new training programs, caloric restriction, or age-related muscle loss. Research shows the clearest benefits in older adults and people new to exercise — it can help preserve muscle mass and strength in those groups. For experienced lifters, the picture is less clear, with some studies showing little added benefit on top of a solid training program.
This page compares HMB supplements by their real cost per month at a standard 3g/day dose. Most products are sold as calcium HMB (CaHMB) in powder or capsule form, with a smaller number offering HMB free acid. Prices vary significantly — bulk powder is typically the cheapest way to supplement HMB, while capsule convenience carries a premium. Rankings are based on cost per active milligram, not the sticker price on the bottle.
Prices as of April 28, 2026. Prices update daily; this page updates monthly. For current prices and full interactive filters, see the HMB (β-Hydroxy β-Methylbutyrate) compare page.
| Rank | Brand | Product | Form | Cost per month | Price |
|---|---|---|---|---|---|
| 1 | BulkSupplements | BulkSupplements.com HMB Powder - as Calcium HMB, Beta-Hydro… | Powder | $5.12 | $46.97 |
| 2 | Nutricost | Nutricost HMB Powder (Beta-Hydroxy Beta-Methylbutyrate) 250… | Powder | $7.18 | $19.95 |
| 3 | PURE ORIGINAL INGREDIENTS | Pure Original Ingredients HMB (8oz) Non-GMO, Gluten-Free, L… | Powder | $7.96 | $19.99 |
| 4 | Primaforce | Primaforce HMB Supplement Powder (200g) (Unflavored) - Pure… | Powder | $8.32 | $18.50 |
| 5 | Life Extension | Life Extension Wellness Code® Muscle Strength & Restore For… | Powder | $24.24 | $24.24 |
| Rank | Brand | Product | Form | Cost per month | Price |
|---|---|---|---|---|---|
| 1 | FITO MEDIC'S | FITO MEDIC'S Lab | hmb |240 Capsules |1000 mg| hmb Supp… | Capsules | $10.49 | $13.99 |
| 2 | GrnLife | HMB and L-Leucine Gummies, HMB and Leucine Amino Acid for A… | Gummies | $11.98 | $5.99 |
| 3 | BulkSupplements | BulkSupplements.com HMB Capsules - as Calcium HMB Supplemen… | Capsules | $12.92 | $21.97 |
| 4 | Nutricost | Nutricost HMB (Beta-Hydroxy Beta-Methylbutyrate) 1000mg (24… | Capsules | $14.63 | $19.50 |
| 5 | Saajoor | 2 Pack HMB and L-Leucine 3000mg with Calcium Gummies - Musc… | Gummies | $14.83 | $9.89 |
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Calcium HMB is the standard form. Most HMB supplements use calcium HMB (CaHMB), which is the form used in the majority of clinical research. It's available as both powder and capsules. Unless you have a specific reason to seek out HMB free acid, calcium HMB is the safe default.
At the powder level, brand doesn't matter much. HMB powder is a simple, well-defined compound — there's not much room for one brand's version to be meaningfully different from another's. Price premiums on bulk HMB powder are hard to justify unless a product offers third-party testing that competitors don't.
Capsule convenience comes at a real cost. At 3g/day, you're looking at 3–6 capsules per serving depending on capsule size. That's a lot of capsules, which is why many users opt for powder. If capsule convenience matters to you, compare the per-month cost against powder — the markup can be substantial.
Dose matters — 3g/day is the studied amount. The ISSN Position Stand on HMB recommends 3g/day, typically split into three 1g doses. Some products are dosed at 1g per serving, requiring three servings daily. Others provide 3g in a single serving. Check how many servings per day you need to hit 3g — a product with 1g per serving and 90 capsules lasts 30 days, not 90.
Watch for underdosed blends. Some products marketed as "HMB" include it alongside other ingredients (creatine, BCAAs, glutamine) at doses well below 3g. If HMB is part of a blend, check the label for the actual HMB amount per serving. A proprietary blend that doesn't disclose individual ingredient amounts makes cost comparison impossible.
Third-party testing is a plus, not a requirement. HMB doesn't carry the contamination risks of some herbal supplements, but independent testing (NSF, Informed Sport, etc.) still confirms that the label matches the contents. Worth noting when comparing two otherwise similar products.
Most HMB supplements use the calcium salt form (CaHMB). A smaller number use HMB free acid (HMB-FA), sometimes marketed as having better absorption. The research on this is genuinely unsettled — an earlier study found HMB-FA reached higher peak blood levels faster, while a more recent 2024 study found calcium HMB had better overall absorption. Neither form has shown clearly better results in actual performance or body composition studies. For most buyers, this isn't a meaningful decision point — calcium HMB is well-studied, widely available, and typically cheaper.
HMB has a moderate evidence base that varies significantly by population. In older adults and people experiencing muscle wasting, multiple meta-analyses support its use for preserving lean mass and strength. The International Society of Sports Nutrition issued a Position Stand supporting HMB supplementation at 3g/day. However, in young, healthy, resistance-trained individuals, systematic reviews have been less favorable — a 2020 meta-analysis concluded that HMB does not meaningfully improve resistance training outcomes in this group. The standard dose of 1–3g/day has been well-tolerated in studies lasting up to 12 weeks, with no significant adverse effects reported. Longer-term safety data is limited.