Friday, Jul 24, 2026 The claims desk. Receipts included. POWERED BY LENZ ↗
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HEALTH

The Claim

Creatine supplementation improves brain fog in humans.

Verified by Lenz ·

The Short Version

Creatine may help some cognitive functions linked to what people call brain fog, but the evidence does not directly show that it generally improves “brain fog” in humans. Most studies measured objective cognitive tasks, not the symptom itself, and positive effects are most apparent in specific settings such as sleep deprivation, older adults, or other higher-demand conditions. The broad, unqualified wording goes beyond the evidence.

Caveats

  • “Brain fog” was generally not a direct trial endpoint; the evidence is mostly indirect from cognitive test performance and fatigue-related measures.
  • Effects are context-dependent and not consistently shown in healthy, well-rested adults; results vary by population, dose, and study design.
  • A regulatory review did not support a general cognition claim at low daily doses, so dose and use case materially affect how the evidence should be interpreted.

The Receipts

  1. The effects of creatine supplementation on cognitive function in adults

    PubMed

  2. UKNHCC scientific opinion: creatine supplementation and improved cognitive function

    UK Government (UKNHCC)

  3. Effect of creatine supplementation and sleep deprivation, with mild exercise, on cognitive and psychomotor performance, mood state, and plasma concentrations of catecholamines and cortisol

    PubMed

  4. The effects of creatine supplementation on cognitive function in adults

    Frontiers in Nutrition

  5. Effects of creatine supplementation on cognitive function of healthy individuals: A systematic review of randomized controlled trials

    PubMed Central

  6. Single dose creatine improves cognitive performance and induces changes in cerebral high energy phosphates during sleep deprivation

    Scientific Reports (Nature portfolio)

  7. "Heads Up" for Creatine Supplementation and its Potential Role in Brain Health and Disease

    PubMed Central

  8. Creatine as a novel treatment for depression and fatigue in post-traumatic brain injury: an open-label study

    PubMed Central (Psychopharmacology)

  9. Acute creatine loading increases brain creatine content and improves performance in a complex cognitive task in humans

    PubMed

  10. Creatine supplementation, sleep deprivation, cortical excitability and cognitive performance

    PubMed

+ 9 more sources — see the full list on Lenz

Filed Under

Brain FogCreatine

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