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Last verified: 20 days ago

Cognizin (Citicoline)

Also known as: citicoline, CDP-choline, cytidine diphosphocholine, cytidine-5'-diphosphocholine

Evidence under review. — Not yet rated

Branded citicoline shown to improve memory in older adults and attention in teens in small clinical trials.

  • What it does

    Cognizin is a patented, branded form of citicoline, a naturally occurring compound involved in brain cell membrane production and energy metabolism. Clinical trials show 500 mg/day for 12 weeks...

  • Evidence quality

    Evidence base hasn't been formally rated yet. See research below.

  • Clinical dose

    250-500 mg daily based on study doses

See full breakdown ↓ Methodology →

What the Science Says

Cognizin is a patented, branded form of citicoline, a naturally occurring compound involved in brain cell membrane production and energy metabolism. Clinical trials show 500 mg/day for 12 weeks improved episodic and composite memory in healthy older adults with age-related memory decline. A separate trial found 28 days of supplementation improved attention, psychomotor speed, and reduced impulsivity in healthy adolescent males. Brain imaging studies also suggest it boosts frontal lobe energy (ATP and phosphocreatine) and supports cell membrane turnover.

What It Doesn't Do

Not proven to prevent or treat Alzheimer's disease based on these studies. No evidence it works for healthy young adults without memory complaints. The appetite-suppression effect seen at very high doses (2000 mg/day) is preliminary and not a proven weight-loss tool. Don't expect overnight results — benefits in studies appeared after weeks of consistent use.

Evidence-Based Benefits

Cognizin is a patented, branded form of citicoline, a naturally occurring compound involved in brain cell membrane production and energy metabolism. Clinical trials show 500 mg/day for 12 weeks improved episodic and composite memory in healthy older adults with age-related memory decline. A separate trial found 28 days of supplementation improved attention, psychomotor speed, and reduced impulsivity in healthy adolescent males. Brain imaging studies also suggest it boosts frontal lobe energy (ATP and phosphocreatine) and supports cell membrane turnover.

Moderate Evidence

Effective at: 250-500 mg daily based on study doses

Source: auto-research

Absorption & Bioavailability

Unknown from provided studies — no pharmacokinetic data reported. Oral dosing was used in all trials with apparent biological effects, suggesting reasonable absorption.

Red Flags to Watch For

  • All clinical evidence uses the branded Cognizin form — results may not apply to generic citicoline products
  • Studies are small (75–100 participants) and short-term (4–12 weeks); long-term safety data is limited
  • The adolescent study had an unequal placebo group (n=24) vs. treatment group (n=51), which can skew results
  • Appetite suppression was only seen at 2000 mg/day — four times the typical supplement dose — making it impractical and potentially overhyped in weight-loss products
  • Most studies appear to have industry ties to Kyowa Hakko, the manufacturer of Cognizin, which is a potential conflict of interest

Research Sources

  • PubMed
  • NIH DSLD

This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-05-02