Best creatine supplement
Thorne Creatine
Single-ingredient 5 g creatine scoop with an NSF Certified for Sport listing
$44
US price, checked
Creatine
Klean Creatine
Plain 5 g creatine scoop that NSF's Certified for Sport database lists
$34.50US price, checked
Check price at Klean Athlete for Klean Creatine Our reviews rest on published sources, not hands-on testing. Our method
Porsche also cofounded Superhuman Chambers, which sells hyperbaric chambers · About the author. This is general information, not medical advice, and no clinician has reviewed it.
The verdict
Klean Creatine is plain creatine monohydrate, 5 g a scoop with no other ingredients, and NSF's Certified for Sport database lists the 315 g tub. It suits an athlete subject to drug testing, or anyone who wants a plain daily dose. The catch is that Klean's page asks for a login to add to cart, and returns carry a 15% fee.
The trade-off
Klean's page asks you to log in to add to cart, and returns carry a 15% processing fee plus shipping.
At a glanceCreatine
- Dose per serving
- 5 g creatine monohydrate (1 scoop, approximately 5 g)
- Servings per container
- Approximately 60 on Klean's label
- Price per serving
- About $0.58 at the $34.50 retail price and 60 servings
- Form
- Unflavored powder, with Other ingredients: None
Model reviewed: 315 g tub, unflavored (SKU KA57692P-315), about 60 servings of 5 g creatine monohydrate
$34.50
Check price at Klean Athlete US price, checked
No affiliate commission on this link. Check the exact variant before buying.
- Returns 30 days from receipt, with preauthorization and a 15% processing fee plus shipping. See conditions
About this price
The $34.50 retail price is from Klean Athlete's own site while logged out, in US dollars, before tax and shipping. It's about $0.58 a serving at the label's approximately 60 servings. The page shows no sale price and asks you to log in to add to cart. Its shop link goes to a Klean Athlete storefront on Amazon, whose prices aren't used here.
$50
Related comparisons: Thorne Creatine vs Momentous Creatine
A GOOD FIT FOR
You want plain creatine monohydrate from a product in NSF's Certified for Sport database, with lot numbers you can check.
- An athlete subject to drug testing who wants a creatine in NSF's Certified for Sport database and will match the tub's lot number
- Plain creatine monohydrate, 5 g a scoop, with no other ingredients
THINK TWICE IF
- If you want to buy from Klean's own page without an account, since it asks you to log in to add to cart
- If you want a flavored drink mix or capsules instead of a scoop of unflavored powder
- If you're pregnant, nursing, have a health condition or take medication, ask a health professional first, as Klean advises
- If you may want to return an opened tub, since the policy doesn't say whether it qualifies and charges a 15% processing fee plus shipping
What still needs checking
- Which NSF entry a given tub's lot number sits in
- The NSF certification date, which neither entry shows
- Whether the page's retail price applies to every buyer, since it asks you to log in
- Whether an opened tub qualifies for return
- Who makes the creatine and where it comes from
- Klean's net weight for the tub
The practical details.
| Exact variant | 315 g tub, unflavored (SKU KA57692P-315), about 60 servings of 5 g creatine monohydrate |
|---|---|
| Dose per serving | 5 g creatine monohydrate (1 scoop, approximately 5 g) |
| Servings per container | Approximately 60 on Klean's label. NSF's 315 g package at 5 g a serving works out to 63 |
| Price per serving | About $0.58 at the $34.50 retail price and 60 servings |
| Form | Unflavored powder, with Other ingredients: None |
| Certification | NSF Certified for Sport lists two entries for the 315 g unflavored powder, with 2 and 16 certified lots |
| Directions | 1 scoop daily in 8 oz of water or another drink, around exercise or with a meal on rest days |
| Free-of statements | NSF's US entry lists gluten free and GMO free. Its other entry lists artificial flavor, artificial preservative, dairy, GMO, gluten, wheat and soy free |
| Warning | Klean says to consult a health professional if you're pregnant, nursing, have a health condition or take any medication |
| Where to buy | Klean's page lists a retail price but asks for a login to add to cart |
| Dimensions | Not stated by the manufacturer. Klean's page gives approximately 60 servings of one scoop (about 5 g) and no net weight or tub size. NSF's listings give a 315 g package. |
| Materials | The only ingredient is creatine monohydrate, 5 g a serving, and the label says Other ingredients: None. Klean's page shows icons for gluten free, GMO free, vegan and vegetarian. Klean's page and product sheet don't name the creatine's source or say what the tub is made of. The product sheet says it's manufactured for Klean Athlete, Pittsburgh, Pennsylvania. |
Before you buy
InstallationNo installation
No installation. Klean says to mix 1 scoop daily with 8 ounces of water or another drink. For best results it suggests a carbohydrate-containing drink or food 30 minutes before exercise, or a recovery drink right after. On rest days it says to take 1 serving daily with a meal.
WarrantyNot stated by the manufacturer
Not stated by the manufacturer. Klean's return policy says it guarantees quality, purity and potency through the expiration date, but gives no warranty term.
Returns30 days from receipt, with preauthorization and a 15% processing fee plus shipping
30 days from receipt, with preauthorization and a 15% processing fee plus shipping. Claims of shortage or damage must be made within 7 days of receiving the package. Authorized returns must reach Klean within 14 days of authorization. Returns are credited on receipt, less the 15% fee and the cost of shipping. The policy doesn't say whether an opened tub qualifies.
More about this assessment
Klean Creatine is plain creatine monohydrate: 5 g per scoop, with no other ingredients listed. Klean Athlete's own page shows a $34.50 retail price for the 315 g tub, about $0.58 a serving at its label's roughly 60 servings. NSF's Certified for Sport database lists two entries for the 315 g unflavored powder, with 2 and 16 certified lot numbers. The page asks you to log in to add to cart. Returns need preauthorization within 30 days and carry a 15% processing fee plus shipping.
Strengths on paper
- One ingredient, 5 g of creatine monohydrate per scoop, with Other ingredients: None
- NSF's Certified for Sport database lists the 315 g tub, with lot numbers you can match to yours
- Klean's page shows gluten free, GMO free, vegan and vegetarian icons
- About $0.58 a serving at the retail price on Klean's page
Limitations
- Klean's page asks you to log in to add to cart
- Returns need preauthorization and carry a 15% processing fee plus the cost of shipping
- Two NSF entries cover the tub, and NSF doesn't say how they relate
- Klean's product sheet is dated March 2022
- Klean's page gives no net weight or tub size
Running costs.
PLAN YOUR OWNERSHIP COSTS
What will it cost to own?
Change the assumptions to fit your use. Leave an unknown cost blank. Add water, subscriptions, cleaning, shipping and taxes if they apply. Use average operating power, not the maximum rating.
3-year planning total
$664.14Every field has a value. This is an estimate, not a quote.
Energy component: $0.00
Purchase + installation + years × (annual consumables + annual other) + watts/1000 × hours/day × 365 × years × $/kWh. Annualized allowances, not an exact replacement schedule. Excludes taxes, shipping, finance and resale unless entered.Replacement parts & cost assumptions
Recorded recurring parts and refills:
- Klean Creatine 315 g tub (KA57692P-315): $34.50 about every 9 weeks. One tub lasts about 60 days (about 1.97 months) at one scoop a day, using the label's approximately 60 servings. The cost is the $34.50 retail price, before tax and shipping.
- Annual refills at one scoop a day: 365 servings / 60 per tub x $34.50 = $209.88 at the retail price on Klean's page. That leaves out tax and shipping.
- The first $34.50 tub counts as the purchase, and refills cover three full years. So the three-year estimate includes about one tub more than 1,095 daily servings would need.
Evidence & sources.
Do creatine, fish oil, vitamin D and magnesium work? Our evidence review grades the research as Mixed. That grade is about the claim, not about this product.
- CertificationNSF's Certified for Sport database lists two entries for the 315 g unflavored powder with a 5 g serving: "Klean Athlete® Klean Creatine" for the United States with 2 certified lot numbers, and "Klean Creatine" with 16 certified lot numbers and no country of sale shown. A third entry is for Canada.35 You can match the lot number on your tub to the listed lots. Neither entry shows a certification date. A sport certification is about what's in the product, not about health effects.
- Manufacturer claimKlean's product sheet, dated March 2022, says Klean Creatine is tested and certified by the NSF Certified for Sport program. It says no adverse side effects have been reported and suggests 3 to 5 g a day with no loading phase. Klean's page says creatine is clinically studied to help increase body strength, build muscle mass and recover more quickly.16 These are Klean's own statements, and the page carries the standard FDA disclaimer. The sheet cites studies but doesn't say what they found.
- Independent testNIH's Office of Dietary Supplements describes a typical creatine regimen as a 5 to 7 day loading phase of 20 g a day, then 3 to 5 g a day, or single doses of about 3 to 6 g a day for 3 to 4 weeks without loading. It reports no consistent side effects apart from weight gain, which can reach 1 to 2 kg in a month, and calls creatine safe for short-term use by healthy adults.8 One scoop gives 5 g, at the top of the maintenance range. ODS says creatine is of little value for endurance sports and that people respond differently.
- Published studyA 2017 meta-analysis pooled 22 randomized trials with 721 adults, mean ages 57 to 70, who did resistance training while taking creatine or a placebo. The trials ran 7 to 52 weeks. Creatine groups gained 1.37 kg more lean tissue mass (95% CI 0.97 to 1.76). Chest press and leg press strength also rose more, by standardized mean differences of 0.35 and 0.24.7 The trials tested creatine in older adults during resistance training, not this product. The outcomes were lean mass and strength tests, not health outcomes.
- Regulator recordOn Oct 20, 2026, FDA's recall data and warning letter search showed nothing under Klean Athlete.910 An empty result isn't a safety finding on its own.
Sources (11)
- Klean Creatine product page (SKU KA57692P-315) Klean Athlete · manufacturer · checked Oct 20, 2026
- Return Policy Klean Athlete · manufacturer · checked Oct 20, 2026
- Certified for Sport listing: Klean Athlete Klean Creatine NSF Certified for Sport · certifier · checked Oct 20, 2026
- Certified for Sport listing: Klean Creatine NSF Certified for Sport · certifier · checked Oct 20, 2026
- Certified Product Results: Klean Athlete NSF Certified for Sport · certifier · checked Oct 20, 2026
- Klean Creatine product data sheet (March 2022) Klean Athlete · manufacturer · checked Oct 20, 2026
- Effect of creatine supplementation during resistance training on lean tissue mass and muscular strength in older adults: a meta-analysis (Open Access J Sports Med 2017, doi:10.2147/OAJSM.S123529) PubMed · study · checked Oct 20, 2026
- Dietary Supplements for Exercise and Athletic Performance: Fact Sheet for Health Professionals NIH Office of Dietary Supplements · independent test · checked Oct 20, 2026
- openFDA food enforcement reports, search for Klean Athlete U.S. Food and Drug Administration · regulator · data file · checked Oct 20, 2026
- Warning Letters, search for Klean Athlete U.S. Food and Drug Administration · regulator · checked Oct 20, 2026
- Klean Athlete shop address for creatine (forwards to Klean Athlete's Amazon storefront) Klean Athlete · manufacturer · checked Oct 20, 2026
Other options.
Back to our third-party-tested supplements picks →
Momentous
Momentous Creatine
Plain 5 g creatine with an NSF Certified for Sport listing, raw-material source not stated
$42.99
US price, checked
Transparent Labs
Transparent Labs Creatine HMB
Creatine and HMB blend that NSF's Certified for Sport database lists
$49.99
US price, checked
About this review. The facts on this page come from manufacturer pages, certification listings, regulator records, published studies and independent tests, checked Oct 20, 2026. The sources are listed above.
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