Brand comparison · Creatine

Creatine compared: Momentous vs Onnit vs ProHealth Longevity

All three sell plain creatine monohydrate at the 5 g dose the research uses. The real differences are how each one proves what is in the tub, and what a serving costs.

By Kymata Health Editorial Team · Medical review pending · Prices and labels checked on each brand's own site

Quick answer

  • Same dose: 5 g creatine monohydrate per scoop in all three, the amount behind most strength and lean-mass results (grade A).
  • Most proof of purity: Momentous, which is NSF Certified for Sport and publishes batch CoAs. Best for drug-tested athletes.
  • Lowest one-time price: Onnit at about $0.42 a serving; on subscription Momentous and Onnit tie at about $0.36.
  • ProHealth uses the branded Creavitalis ingredient and posts a CoA, but costs the most per serving.

Side by side

One-time price per serving (subscription in brackets), checked Oct 8, 2026. Evidence grade A strong · B moderate · C limited · D preliminary.
ProductLabel per servingEvidencePer servingPer gram of Creatine
Momentous Creatine (90 servings)NSF Certified for Sport; batch CoAsCreatine monohydrate 5 gA$0.48($0.36)$0.10
Onnit Creatine (90 servings)Third-Party Tested badge; no sport certification foundCreatine monohydrate 5 gA$0.42($0.36)$0.08
ProHealth Longevity Creatine Pure PowderCreavitalis ingredient; product CoACreavitalis creatine monohydrate 5 gA$0.56($0.50)$0.11

Our picks

  1. Best for tested athletes

    Momentous Creatine (90 servings)

    NSF Certified for Sport plus batch CoAs.

    $0.48/serving · grade A

    View at MomentousBrand link

  2. Best value

    Onnit Creatine (90 servings)

    Lowest one-time price per serving of the three.

    $0.42/serving · grade A

    View at OnnitBrand link

  3. Best if you already buy NAD+ products

    ProHealth Longevity Creatine Pure Powder

    Same store as ProHealth’s NMN line, with a CoA.

    $0.56/serving · grade A

    View at ProHealth LongevityBrand link

Why creatine is worth buying at all

Creatine monohydrate is the most-studied sports supplement. The International Society of Sports Nutrition position stand (PMID 28615996) supports 3–5 g a day for strength and lean-mass gains with training, and a 2024 meta-analysis of 16 trials found small memory gains (PMID 39070254).

In postmenopausal women, a 2026 meta-analysis found gains in lean mass and leg-press strength when women took at least 5 g a day and lifted (PMID 42141930). Because every brand here gives 5 g, dose is not the deciding factor.

Testing: the real difference

  • Momentous: NSF Certified for Sport on the product page, and batch Certificates of Analysis you can download. NSF screens for banned substances, which matters if you are drug-tested.
  • Onnit: a "Third-Party Tested" badge and a brand statement that all supplements are third-party tested; we found no NSF or Informed Sport certification and no public batch CoA.
  • ProHealth: a Certificate of Analysis on the product page and a brand statement of triple independent lab testing; no sport certification.

How to take it

  • 5 g a day, any time of day, with or without a 5–7 day loading phase (20 g/day split into four doses) if you want faster saturation.
  • Expect 1–2 kg of water weight early on; it is water inside muscle.
  • Ask your clinician first if you have kidney disease.

FAQ

Is Momentous creatine better than Onnit creatine?

Not in what is inside: both are 5 g creatine monohydrate. Momentous carries NSF Certified for Sport and batch CoAs; Onnit is cheaper one-time. On subscription the price per serving is about the same.

Do I need to load creatine?

No. Loading (about 20 g a day for 5–7 days) saturates muscle faster, but 3–5 g a day gets you to the same place in about a month.

Is creatine safe for women over 40?

Creatine has been studied in postmenopausal women in randomized trials, pooled in the 2026 meta-analysis cited on this page. Talk to your clinician first if you have kidney disease or take medicines that affect the kidneys.

Related

Creatine for women over 40 →Doses, evidence and how to pair it with training.Momentous review →The full Momentous lineup, checked.Onnit review →Alpha BRAIN and the rest of the lineup.ProHealth Longevity review →NMN, NMNH and healthy-aging products.

Sources

Product facts come from each brand's own product pages, read Oct 8, 2026; see each brand review for page-level sources.

  1. Kreider RB et al. ISSN position stand: creatine supplementation. J Int Soc Sports Nutr 2017. · PMID 28615996
  2. Xu C et al. Creatine supplementation and cognitive function in adults: meta-analysis. Front Nutr 2024. · PMID 39070254
  3. Creatine monohydrate in postmenopausal women: systematic review and meta-analysis. J Int Soc Sports Nutr 2026. · PMID 42141930