Best Creatine Supplements, Third-Party Tested

Thorne Creatine is the best creatine for most people because it is plain creatine monohydrate with NSF Certified for Sport behind it, at a price that is high but not absurd. Klean Athlete and Momentous are equally strong certified alternatives, and Optimum Nutrition Micronized Creatine is the budget pick if you do not compete in a tested sport. Skip anything that charges extra for a fancier form: the research record belongs to monohydrate.

This list is built from labels, certification databases and the published evidence, not from a claim that we trained on every tub. We checked that each product is creatine monohydrate, whether the exact product appears in a third-party certification program, what else is in the scoop, and the rough cost per serving from public listings. Prices change often, so verify current pricing before you buy.

Creatine is one of the most studied supplements in sport nutrition, but it is still not for everyone. If you have kidney disease, diabetes, high blood pressure, or take medication, talk to your doctor before starting it, and do the same if you are pregnant, breastfeeding or under 18.

The creatine products we rate, side by side

Per-serving costs are approximate, based on brand sites and large retailers at the time of writing, and assume the full tub at the label serving size. Subscription discounts can cut them further.

Why monohydrate is the only form worth paying for

The International Society of Sports Nutrition position stand on creatine (Kreider and colleagues, Journal of the International Society of Sports Nutrition, 2017) describes creatine monohydrate as the most effective nutritional supplement available for increasing high-intensity exercise capacity and lean body mass during training, and as safe in healthy people across the studies it reviewed. That conclusion is about monohydrate specifically. Newer forms such as creatine HCl, buffered creatine and creatine ethyl ester have far less human research and no strong evidence that they work better.

Our monohydrate vs HCl comparison walks through the evidence in more depth. The practical upshot is simple: pay for purity and testing, not for a novel molecule.

Thorne Creatine is the default choice

Thorne Creatine is a single-ingredient creatine monohydrate powder listed in the NSF Certified for Sport program. That certification tests each lot for more than 280 banned substances and checks that the label matches what is in the tub. Thorne lists the 90-serving tub at roughly $43 on its own site, which works out under fifty cents a scoop before any subscription discount.

Some retailer pages and blogs describe the raw material as Creapure, a German-made monohydrate, but Thorne's own current label is the source to check, since one 2026 review noted a formula change tied to supply. Our Thorne review covers the brand's wider testing practices.

Klean Athlete and Momentous are the certified alternatives

Klean Creatine from Klean Athlete is another unflavored monohydrate in the NSF Certified for Sport program, and the brand was built around supplying teams and tested athletes. Its price per serving runs a little above Thorne at most listings. If you already trust the brand for protein or a multivitamin, our Klean Athlete review covers its broader line.

Momentous Creatine is also NSF Certified for Sport, and the brand markets it as made with Creapure. It is usually the priciest of the three plain monohydrates here. You are paying for the brand's sports-team positioning and its named raw material rather than for a different result, since the active ingredient is the same. Our Momentous review has more on the company.

Optimum Nutrition is the budget pick for untested athletes

Optimum Nutrition Micronized Creatine is one of the cheapest creatine powders from a large, established manufacturer. Micronized means the particles are ground finer, which helps it mix into water with less grit; it does not change what creatine does. It often costs well under half of the certified options per scoop.

The trade-off is the certification question. We could not confirm a current NSF Certified for Sport listing for this exact product, so anyone subject to drug testing should look it up on a certifier database or pick a listed product instead. For recreational lifters who are not tested, a plain monohydrate from a large manufacturer is a reasonable value choice.

Transparent Labs is for people who want HMB too

Transparent Labs Creatine HMB combines creatine monohydrate with HMB (beta-hydroxy beta-methylbutyrate) and, in some versions, vitamin D and black pepper extract. The brand publishes batch certificates of analysis, which is useful, but that is not the same as an independent sport certification. HMB has a mixed research record in trained people, so you pay noticeably more per serving for an ingredient whose added benefit is uncertain. Our Transparent Labs review covers the brand's testing in detail.

Safety, kidney labs and who should ask a doctor first

In healthy adults, the ISSN position stand found no consistent evidence of harm from creatine at the amounts studied. That is not the same as safe for every reader. People with existing kidney disease, or who take medications that affect the kidneys, such as some NSAIDs, diuretics or certain diabetes drugs, should not start creatine without their clinician's approval.

There is also a practical lab issue. Creatine can raise blood creatinine, a marker doctors use to estimate kidney function, which can make a routine blood test look worse than it is. Tell your doctor you take creatine before any blood work. Our guide to blood tests before supplements explains why that conversation matters. Some people report stomach upset or water weight; neither is dangerous for most, but both are worth discussing if they bother you.

Creatine has not been well studied in pregnancy or in teenagers, so both groups should ask a clinician rather than follow a supplement label.

How to pick a creatine without overpaying

Check four things. First, the form: the label should say creatine monohydrate. Second, the ingredient list: a plain creatine powder needs nothing else, so flavors, sugar and blends add cost and variables. Third, the certification: if you are drug tested, look up the exact product on the NSF Certified for Sport database, since a familiar brand name alone does not confirm it. Fourth, the real price per serving after shipping, which our cost per serving guide shows how to calculate.

Be wary of the extras sold alongside creatine. Gummies, flavored blends and pre-workout products that contain creatine often list it inside a blend or at a lower amount per serving than a plain powder, and some add caffeine or stimulants that change the safety picture entirely. Loading phases, cycling schedules and timing rules also appear on many labels; those are questions for a sports dietitian or your doctor, not something a review site should set for you. A plain, single-ingredient tub keeps the label simple enough for your clinician to assess in seconds.

For a broader look at what athletes actually use, see our guide to the best supplements for athletes, and for the certification itself, our explainer on what NSF Certified for Sport means.

The bottom line: buy a plain creatine monohydrate, choose Thorne or another NSF Certified for Sport product if you are tested, and check with your doctor first if you have kidney concerns or take regular medication.