The Best Creatine for GLP-1 Users

Creatine is the least glamorous item on the short list and probably the best value on it. It is also the one where the product choice barely matters and the understanding matters a great deal, so this article is weighted differently to the others: a short ranking, and a long section on the two things that make people stop taking it.

Why it earns a place here specifically

The case is not that creatine burns fat. It does not. The case is that these drugs take off a lot of weight quickly — SURMOUNT-1 reported 20.9% at 72 weeks on the top dose — and body-composition data show a meaningful share of that coming from lean tissue. The two interventions that shift the ratio are resistance training and protein. Creatine is the third, and it works by supporting the training rather than by acting on the muscle directly.

That is a modest claim and it is the correct one. If you are not lifting anything, creatine has much less to offer you.

The two things nobody warns you about

The scale goes up. Creatine draws water into muscle cells. Expect roughly 1–2 kg in the first one to two weeks, then nothing further. On any other diet that is a nuisance. On a GLP-1, where you are weighing weekly and reading the number as a verdict on whether the drug is working, it is genuinely destabilising — it can wipe out a fortnight of real loss on paper while your body composition is improving underneath. I have seen people stop the drug over it, which is a considerably worse outcome than stopping the creatine.

Start creatine on a week when you are not making a decision about your dose, and remember the number will not tell you the truth for a fortnight.

Your creatinine rises. Creatinine is the breakdown product of creatine. Take more creatine, make more creatinine — typically an increase of about 0.1–0.3 mg/dL. eGFR is calculated from creatinine, so a calculated kidney function that was 95 comes back 85 and nobody knows why. In people with healthy kidneys this is a measurement artefact with a long safety literature behind it, not injury.

But it is exactly the sort of thing that gets misread on a drug where prescribers are alert to dehydration and kidney trouble. So: tell whoever orders the blood test. Add it to the list of numbers you follow. If there is a genuine question about kidney function, stopping creatine for two weeks before a repeat test settles it. And if you already have kidney disease, this is a conversation with your prescriber rather than a decision from an article.

The rubric

1. Form. Monohydrate, or a reason not to.
2. Purity documentation. Creapure branding or a third-party certification.
3. Dose transparency. 5 g of creatine per scoop, stated, not buried in a blend.
4. Mixability. Micronized dissolves; standard grind sits at the bottom of the glass in a layer of grit, which on a queasy stomach is a real obstacle.
5. Gastrointestinal tolerability. Split-dosable, no stimulants or sugar alcohols riding along.
6. Cost per 5 g serving. This is a multi-year purchase.
7. Availability.

Note what is not on the list: absorption claims. Monohydrate is roughly 99% bioavailable. There is no headroom for a premium form to improve on.

The ranking

1. Thorne Creatine

Best overall.

Micronized monohydrate, NSF Certified for Sport, one ingredient, 5 g per scoop stated plainly. It dissolves properly, which sounds trivial until you are trying to get gritty water down at 8 a.m. on a slow stomach. The certification is what pushes it above cheaper monohydrates that are chemically identical: with a supplement you will take daily for years, an independent check on what is in the tub is worth a few cents a serving.

Where it falls short. Two to three times the price of the budget options for a molecule that is the same molecule. If cost is the binding constraint, buy further down this list without guilt.

2. Minome GLP-1 Foundation

Best for doing two jobs in one scoop. (minomehealth.com)

This is the only product in the ranking built for the person reading it rather than for an athlete, and the design decision is a sensible one: 5,000 mg of creatine monohydrate — the full clinical dose, not the 3 g convenience formats settle for — alongside 1,000 mg of sodium, 200 mg of potassium and 60 mg of magnesium in a single 10 g scoop.

The argument for that combination is specific to this drug. Two of the four items on the short list are creatine and electrolytes, and both go short for the same reason: you are eating far less food. Pill burden and stomach capacity are real constraints here in a way they are not for a healthy 25-year-old, and one unflavoured scoop in water is easier to sustain than a tub plus a sachet. Unflavoured also ages better than sweetened when taste aversion arrives around month four.

Where it falls short. It carries no NSF Certified for Sport or Informed Choice registry entry, and while third-party testing is described, there is no public batch certificate to look up — which is the exact criterion I used to put Thorne above cheaper, chemically identical monohydrate, and it is why this sits second rather than first. Roughly three times the price of buying unflavoured creatine on its own. Direct-to-consumer only, so you cannot restock it in a pharmacy. And the 1,000 mg of sodium is a real dose: useful if your intake has collapsed, a conversation with your prescriber if you have hypertension, heart failure or kidney disease.

3. Momentous Creatine

Best documented.

Creapure monohydrate — the German-manufactured grade with the tightest published impurity specifications — plus NSF Certified for Sport. Effectively a tie with Thorne on quality; it sits second only on price and availability.

Where it falls short. The most expensive per gram here, and less widely stocked.

4. Optimum Nutrition Micronized Creatine Powder

Best balance of price and quality, and the one I would suggest by default.

Creapure-sourced micronized monohydrate at a fraction of the boutique price, sold in almost every sports nutrition aisle and online marketplace. Unflavoured, 5 g per scoop, dissolves well. For most people this is the right answer.

Where it falls short. Not NSF Certified for Sport across the range, which matters if you are drug-tested for sport and not otherwise.

5. Klean Athlete Klean Creatine

Best for anyone who is drug-tested.

NSF Certified for Sport, straightforward monohydrate, made for athletes who need certainty about contamination. Functionally interchangeable with the top two.

Where it falls short. Priced for the certification. Nothing here that Thorne does not also do.

6. Nutricost Creatine Monohydrate

Best budget option with testing.

Cheap, large tubs, third-party tested with results available. If your reason for buying creatine is that it costs almost nothing to try, this is the version of that argument with a quality floor.

Where it falls short. Not micronized in every format, so mixability varies. Documentation is thinner than the certified brands.

7. BulkSupplements Creatine Monohydrate

Lowest cost per gram.

Bulk bags, no flavouring, no scoop theatre, the lowest price per 5 g serving in this list by a wide margin. Third-party tested with certificates of analysis published.

Where it falls short. You need a scale or a measuring spoon, the packaging is unhelpful, and a kilogram bag of unflavoured powder is a big commitment to a supplement you have not tried. Grittier than the micronized options.

Summary

What to ignore

Creatine HCl, buffered creatine, ethyl ester, “next generation” forms. They are marketed on a solubility and stomach-tolerance argument that monohydrate does not actually lose, and they cost several times more. The entire evidence base — decades of it — is on monohydrate.

Gummies. Convenient, and dose per gummy is often low and sometimes poorly documented. If you go this way, read the label for grams of creatine, not number of gummies.

Anything that stacks creatine with a stimulant. You do not need a pre-workout on a drug that is already changing your heart rate and your fluid status.

How to take it

3–5 g a day, every day, timing irrelevant. With food if it upsets your stomach; split into two 2.5 g doses if 5 g does. Take it on rest days — saturation is the point, not the workout. Drink enough water, which on this drug you should be doing anyway for the reasons in the electrolytes piece.

And take it alongside protein and actual training, not instead of them. On its own it is a supplement in search of a stimulus.