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Front of Optimum Nutrition Micronized Creatine Powder, Unflavored, 60-serving (300 g) tub

Micronized Creatine Powder

One of America's best-selling creatine tubs: 5 g of micronized monohydrate per scoop, Informed Choice certified, about $0.20–$0.30 a serving.

8.8

Excellent

Nutrition Reviews score

Weighted across efficacy, quality, value, experience & transparency. See breakdown

Form
Powder
Serving
1 rounded teaspoon (5 g)
Servings
60
Videos
4
Informed Choice
Keto-friendlySugar-free
Check price on AmazonShop on TikTok Shop17.7K+ soldBuy from the brand

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Last reviewed September 29, 2026 by the Nutrition Reviews Editorial Team · How we review

Our verdict

A dependable, no-frills creatine from the category's best-known brand, with Informed Choice certification and a clean single-ingredient label. It is not the cheapest per gram and it does not fully dissolve in plain water, but it delivers exactly what the research supports at a fair price.

Best for

  • Lifters who want a trusted, widely stocked brand
  • Stirring into a daily protein shake
  • Tested athletes who want Informed Choice screening

Skip it if

  • Buyers who specifically want Creapure or NSF Certified for Sport
  • Shoppers chasing the lowest cost per gram

How it scored

Our five-factor score out of 10. Factors are weighted by how much they matter to the outcome you’re paying for. Methodology

8.8
Excellent

out of 10

  • Efficacy30%9.4

    Key ingredients at clinically studied doses, and how strong the evidence is.

  • Quality & Purity25%8.6

    Third-party testing and certifications, manufacturing standards, contaminant testing, recall history.

  • Value20%8.6

    Cost per effective serving compared with category peers.

  • Experience15%8.4

    Taste, mixability, texture and tolerability from aggregated buyer and creator feedback.

  • Transparency10%8.5

    Full label disclosure (no proprietary blends), available COAs, honest marketing.

Our review

Optimum Nutrition's Micronized Creatine Powder is about as simple as a supplement gets. The unflavored version lists a single ingredient, creatine monohydrate, at 5 g per rounded teaspoon. That matches the daily dose used across most of the creatine research, and monohydrate is the form with the deepest evidence for raising muscle creatine stores, supporting output in repeated high-intensity efforts and adding lean mass alongside resistance training.

"Micronized" means the powder is milled finer than standard creatine so it suspends more easily in liquid; it does not change how the creatine works once absorbed. Buyer feedback reflects that nuance. buyers overwhelmingly praise its quality, value and neutral taste, yet dissolvability is the most common complaint, with many noting grit at the bottom of a glass of plain water. Stirring right before drinking, or adding it to a protein shake, solves most of that.

On quality, ON's support site lists its creatine among the products certified by Informed Choice, LGC's program that screens batches for substances banned in sport. It is not NSF Certified for Sport and does not use branded Creapure, which is where pricier options set themselves apart.

Price is the other draw. The 60-serving tub sold for about $18–$23 at major retailers when we checked, and the 240-serving tub brings the cost to roughly $0.20 per 5 g serving. ON also sells fruit flavors; the brand says Mango Orange, Strawberry and Watermelon Lime use a 6 g scoop and contain no artificial flavors, colors or sweeteners.

What’s inside

Key ingredientPer serving
Creatine monohydrate (micronized)

The most studied form of creatine; 3–5 g a day keeps muscle creatine stores elevated once saturated.

5 g

Supplement Facts

Serving Size 5 g (1 Rounded Teaspoon)

Servings Per Container 60

Amount Per Serving% Daily Value
Creatine Monohydrate 5 g*

* Percent Daily Values are based on a 2,000 calorie diet. † Daily Value not established.

Other ingredients: None.

Panel shown for the Unflavored version. Transcribed from the manufacturer’s label (vitacost.com). Formulas change — always check the label on the product you buy.

Flavors & variants

UnflavoredMango OrangeStrawberryWatermelon LimeBlueberry Lemonade

Testing & quality

Gold Standard 100% Whey, Gold Standard 100% Isolate, Essential AMIN.O. Energy, Creatine and Glutamine are Informed Choice certified (per the brand); other products are not all certified, so check each label.

Creator video reviews

Independent creators reviewing Micronized Creatine Powder on TikTok and YouTube.

4 positive0 mixed0 critical

Pros & cons

What we like

  • 5 g of creatine monohydrate per serving, the dose used in most studies
  • Unflavored version is a single ingredient with nothing else added
  • ON lists its creatine as Informed Choice certified for banned-substance screening
  • Large tubs cost about $0.20 per serving
  • Neutral taste that disappears into shakes, per most buyer reviews

Watch-outs

  • Dissolvability is the top complaint; many buyers see grit in plain water
  • Some buyers report tubs arriving without a scoop
  • Not Creapure and not NSF Certified for Sport, unlike premium rivals
  • Costs more per serving than budget bulk brands

Questions buyers ask

Do I need a loading phase with ON Micronized Creatine?
No. Taking 5 g a day gradually saturates muscle creatine stores over roughly three to four weeks. A loading phase of about 20 g a day, split into four 5 g doses for five to seven days, gets you there faster, but the end point is the same. Some people find the larger loading doses upset their stomach.
Why does it leave grit at the bottom of my glass?
Creatine monohydrate only dissolves moderately in cold water, and micronizing helps it suspend rather than vanish completely. buyers raise this more than any other issue. Slightly warm water, stirring right before you drink, or blending it into a protein shake reduces the residue. The sediment is still creatine, so finish the last sip.
How do the flavored versions differ from unflavored?
Unflavored is creatine monohydrate alone at a 5 g rounded teaspoon. ON says its Mango Orange, Strawberry and Watermelon Lime flavors use a 6 g serving to make room for flavoring and contain no artificial flavors, colors or sweeteners. Unflavored is cheaper per serving and easier to stack into shakes or other drinks.
Sources we checked (8)
  1. 1.optimumnutrition.com/en-us/products/creatine-monohydrate-micronized-powder
  2. 2.optimumnutrition.com/en-us/products/creatine-monohydrate-micronized-powder.json
  3. 3.vitacost.com/optimum-nutrition-micronized-creatine-powder-unflavored
  4. 4.support.optimumnutrition.com/en/support/solutions/articles/80000803058-are-your-products-informed-
  5. 5.amazon.com/dp/B002DYIZEE
  6. 6.amazon.com/dp/B002DYIZEY
  7. 7.shop.tiktok.com/us/k/optimum-nutrition-creatine
  8. 8.optimumnutrition.com/en-us/pages/about-us

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Read the research

Small ceramic bowl of white creatine powder with a metal measuring scoop and a glass of water on a pale stone countertop
Guides 10 min read

Creatine Monohydrate: The Evidence-Based Guide (2026)

How much creatine to take for your weight, whether to load, and what research says about water weight, hair loss, kidneys, the brain and pricier forms.

Nutrition Reviews Editorial Team · Sep 28, 2026