Creatine HCl: What the Salt Is, and How Much Creatine a 750 mg Serving Actually Contains

Searches for creatine HCl and creatine hydrochloride run to roughly 22,000 a month in the United States. Almost all of the coverage compares the form against creatine monohydrate. This page does something narrower: it reads what the salt is, weighs it, and counts what the market and the literature actually contain. The head-to-head comparison lives on our creatine monohydrate versus HCl page, which counts the comparative trials; this one is about the ingredient on its own terms. It reports figures with their sources and contains no usage guidance, per our editorial standards.

The molecule, and why the partner matters

Creatine is one compound: 2-[carbamimidoyl(methyl)amino]acetic acid, molecular weight 131.13 g/mol, PubChem CID 586. It is not sold in that form. It is sold as a salt or a hydrate, because the free base is awkward to crystallise, handle and keep stable in a tub.

Two partners dominate the shelf:

The partner is inert as far as the muscle is concerned — a water molecule in one case, hydrochloric acid in the other — but it is not weightless. Hydrochloric acid is heavier than water, which is the entire reason the third column differs. A gram of creatine monohydrate carries 879 mg of creatine. A gram of creatine hydrochloride carries 782 mg.

That is a 12% difference in favour of monohydrate per gram, and it runs in the opposite direction to the usual claim, which is that less hydrochloride is needed. Worked the other way: to match the creatine in 5 g of monohydrate, a person would need about 5.6 g of the hydrochloride, not less.

None of this settles whether one form works better. It settles only what is in the scoop, which is a separate question and one the labels can be checked against.

What the labels declare

The NIH Office of Dietary Supplements maintains the Dietary Supplement Label Database, which holds the label of record for products sold in the United States. Queried on 2026-09-18:

• 216 on-market labels mention creatine hydrochloride, and 305 off-market ones do.
• 1,703 on-market labels mention creatine monohydrate.
• 2,412 on-market labels mention creatine in any form.

So the hydrochloride is on roughly 9% of creatine-containing products currently on the market. It is a real category and a minority one. The off-market number being larger than the on-market number is worth noting in passing: more hydrochloride products have left the database than are in it.

Most of those 216 are blends — pre-workouts and multi-ingredient formulas where the creatine is one line among thirty. To see what a serving of the ingredient looks like, we filtered the first 200 on-market records returned to those listing creatine hydrochloride as a named ingredient (138 of 200) and then to those with five ingredients or fewer, which leaves 13 near-single-ingredient products.

Twelve of the thirteen declare exactly 750 mg of creatine hydrochloride per serving. The thirteenth declares 1.5 g. The twelve span seven brands, including the brand that originated the form, and cover capsules, powders and pre-measured packets.

That convergence is the most interesting thing on the shelf. A single figure repeated across seven independent brands is a market convention, not a coincidence, and we could not find a published rationale for it.

One honest qualification, from this site's own earlier tabulation. When we counted 83 on-market creatine capsule and tablet labels for the capsule-versus-powder page, the median capsule also held 750 mg — of monohydrate. So part of the convergence is simply how much powder fits in a size-0 capsule, and not a dosing decision about this salt at all. What that cannot explain is the rest of the list here: the loose powders, the pre-weighed sachets and the bulk tubs in the set declare 750 mg as well, and a scoop has no physical reason to stop there.

The arithmetic of a 750 mg serving

Apply the mass fraction from the table above:

• 750 mg of creatine hydrochloride contains about 587 mg of creatine.
• 5 g of creatine monohydrate contains about 4.4 g of creatine — the figure the trial literature is built on.
• The ratio is about 7.5 to 1.

Put next to the numbers in the published record, the standard hydrochloride serving supplies roughly 13% of the creatine in a standard monohydrate serving. Against the 3 g maintenance figure that carries an authorised EU health claim, it supplies about 22%.

An equivalence claim therefore has to do a great deal of work. It requires that the smaller amount be absorbed or retained several times more efficiently — not marginally, but by a factor of five or more. No published study has measured muscle creatine content after any dose of creatine hydrochloride, which is the measurement that would settle it. The founding work on monohydrate did exactly that with muscle biopsies; the hydrochloride literature has no equivalent.

Six papers, and what is in them

A PubMed search for "creatine hydrochloride"[tiab] on 2026-09-18 returns six records in total. Counting them is not enough — this site's own lesson is that a count without classification invents a literature — so here is every one:

Three randomised trials, two rodent studies, one first-use report. Two of the three trials are from 2026 and one of those is in a disease population. The broader search, creatine hydrochloride without the title-and-abstract restriction, returns 282 records, but that number catches creatinine assays, hydrochloride salts of unrelated drugs and buffer recipes; it is not a literature on this ingredient.

For scale: a 2025 safety analysis of creatine supplementation covered 685 trials, and about 95% of them used monohydrate. The evidence base for the compound and the evidence base for this salt are not the same size by three orders of magnitude.

The dose the trials used is not the dose on the label

This is the finding that ties the two halves of the page together.

The 2024 trial (PMID 39545789) is the one that states its dose plainly: participants took creatine hydrochloride at 0.03 g per kilogram of body mass per day for eight weeks alongside resistance training. For an 80 kg adult that is 2.4 g a day — and for a 100 kg adult, 3 g.

The labels declare 750 mg.

So the randomised evidence that exists for this form was generated at roughly three to four times the amount a single-ingredient product declares per serving. A reader comparing the trial and the tub is not comparing like with like, and neither the trial nor the label says so.

The 2026 soccer trial does not state its per-form dose in its abstract, so we do not quote one for it.

What is established, and what is not

Established. Creatine hydrochloride is a genuine creatine salt; it dissolves more readily than monohydrate; it is 78.2% creatine by mass; a small number of randomised trials exist; and the US market has converged on a 750 mg serving.

Not established. That 750 mg raises muscle creatine at all — nobody has measured it. That the form is dose-sparing. That improved solubility changes absorption in a way that matters at the amounts people use; the one study to test physical state found undissolved creatine still raised plasma creatine five- to six-fold, which suggests dissolution is not the limiting step.

Not addressed here. Whether one form outperforms the other. That is the comparison question and it has its own page, built on the two trials that ran the comparison directly.

What would change this page

A study measuring muscle total creatine after 750 mg of creatine hydrochloride. A published rationale for the 750 mg convention from the company that established it. Or a trial of the form at the label's own serving size — as of today, every randomised trial of this ingredient used several times more than the shelf does.

Key figures

• 78.2% — creatine by mass in creatine hydrochloride, against 87.9% in monohydrate.
• 5.6 g — hydrochloride needed to match the creatine in 5 g of monohydrate.
• 12 of 13 near-single-ingredient US labels declare 750 mg per serving.
• 587 mg — the creatine in a 750 mg serving; about one-seventh of a 5 g monohydrate serving.
• 6 — PubMed records naming the form in a title or abstract, of which 3 are randomised trials.
• 0.03 g/kg/day — the dose in the trial that states one, roughly 2.4 g for an 80 kg adult.

This page reports molecular weights, label declarations and published study doses. It contains no recommendation, and decisions about supplementation belong with a clinician.

Sources

• National Center for Biotechnology Information. PubChem Compound Summary for CID 586 (creatine), CID 80116 (creatine monohydrate) and CID 134732 (creatine hydrochloride) — molecular formulae and weights retrieved 2026-09-18 — pubchem.ncbi.nlm.nih.gov
• NIH Office of Dietary Supplements. Dietary Supplement Label Database — on-market and off-market label counts and individual label records for creatine hydrochloride products, queried 2026-09-18 — dsld.od.nih.gov
• Eghbali E, Arazi H, Suzuki K. Supplementing With Which Form of Creatine (Hydrochloride or Monohydrate) Alongside Resistance Training Can Have More Impacts on Anabolic/Catabolic Hormones, Strength and Body Composition? Physiol Res 2024;73(5):739–753 — PMID 39545789 · doi:10.33549/physiolres.935323
• Duan C, Wang Z, Wang Q. Creatine formulations and repeated sprint training: effects on physical and physiological adaptations in soccer players during the short-term preparation phase. J Int Soc Sports Nutr 2026;23(sup1):2721147 — PMID 42720250 · doi:10.1080/15502783.2026.2721147
• Harris RC, Nevill M, Harris DB, Fallowfield JL, Bogdanis GC, Wise JA. Absorption of creatine supplied as a drink, in meat or in solid form. J Sports Sci 2002;20(2):147–51 — PMID 11811571 · doi:10.1080/026404102317200855
• Kreider RB, Gonzalez DE, Hines K, et al. Safety of creatine supplementation. J Int Soc Sports Nutr 2025;22(sup1):2488937 — PMID 40198156 · doi:10.1080/15502783.2025.2488937
• National Library of Medicine. PubMed — census searches for "creatine hydrochloride"[tiab] and creatine hydrochloride, run 2026-09-18 — pubmed.ncbi.nlm.nih.gov

All sources retrieved 2026-09-18. Database and literature counts are as of that date and will move.