Tier A

Creatine Monohydrate

Also known as: α-methyl guanidinoacetic acid · Creatine monohydrate (Cr-H2O) · Creapure

67 PMID anchor · MUSCULO · METABOLISM · CNS · MITO · Last reviewed 2026-05-31

Mechanism of action

  • Phosphocreatine system ATP regeneration
  • Muscle cell water retention (cell volumization)
  • mTOR signaling potentiation
  • Brain creatine pool augmentation

Molecular + tissue targets

  • Skeletal muscle phosphocreatine reserve
  • Brain creatine kinase axis
  • Mitochondrial bioenergetics

Dosage range

3-5 g/day maintenance; optional 20 g/day × 5-7 day loading (4 × 5 g); higher dose (10 g/day) explored for cognitive endpoints

Safety notes

Most studied performance supplement; no harm in healthy kidneys (Kreider 2017 ISSN position); creatinine elevation is metabolite (not kidney injury marker in creatine users); hydration recommended

Cross-market regulatory status

🇺🇸 FDA

Self-affirmed GRAS (AlzChem Creapure · GRN 144 · 2003) · DSHEA dietary supplement framework

🇪🇺 EFSA

Authorized claim for creatine + increased physical performance in repeated short-term high-intensity exercise (3 g/day)

🇧🇷 ANVISA

RDC 243/2018 dietary supplement · IN 28/2018 Anexo V alegação funcional verbatim: "A creatina auxilia no aumento do desempenho físico durante exercícios repetidos de curta duração e alta intensidade." (Anexo III ≥ 3.000 mg/dia adultos ≥ 19 anos)

Authorized claims · verbatim (4)

Direct quotes from each jurisdiction's framework · never paraphrased · with framework reference and conditions of use.

🇺🇸 FDA · 1 claim

Self-affirmed GRAS (multiple GRN submissions including AlzChem Creapure GRN 144 · 2003) + DSHEA dietary supplement framework

Creatine monohydrate is Generally Recognized As Safe (GRAS) under specified conditions of use.

Authorized 2003

🇪🇺 EFSA · 2 claims

Reg 432/2012

Creatine increases physical performance in successive bursts of short-term, high intensity exercise.

Conditions: 3 g/day · adult population doing high-intensity exercise

Authorized 2012

Reg 432/2012

Daily creatine consumption can enhance the effect of resistance training on muscle strength in adults over the age of 55.

Conditions: 3 g/day creatine + resistance training

Authorized 2017

🇧🇷 ANVISA · 1 claim

IN 28/2018 Anexo V alegação funcional

A creatina auxilia no aumento do desempenho físico durante exercícios repetidos de curta duração e alta intensidade.

Conditions: IN 28/2018 Anexo V: alegação restrita aos suplementos cuja quantidade de creatina atenda aos valores mínimos do Anexo III (≥ 3.000 mg/dia = ≥ 3 g/dia para adultos ≥ 19 anos · NA para outros grupos populacionais)

Authorized 2018

Common use cases

  • athletic performance (resistance training)
  • sarcopenia prevention (older adults)
  • cognitive support (sleep deprivation · vegetarian baseline)
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