Citicoline (CDP-Choline)

What Is Citicoline (CDP-Choline)?

Citicoline is a naturally occurring choline-cytidine compound (cytidine-5’-diphosphocholine) sold as a cholinergic nootropic. It supplies choline for acetylcholine synthesis and cytidine for phospholipid (phosphatidylcholine) membrane turnover, which is the usual rationale for its use in focus, memory and brain-recovery contexts. Unlike most nootropics in this class, citicoline actually has some placebo-controlled human data — though it is modest and the strongest trials are industry-funded.

Evidence

A randomised, double-blind, placebo-controlled trial in 100 healthy older adults with age-associated memory impairment reported that 500 mg/day of citicoline for 12 weeks improved composite and episodic memory versus placebo ^{1Reference 1Nakazaki E et al. · 2021RCTCiticoline and Memory Function in Healthy Older Adults — randomised controlled trialView study →}. Citicoline has also been studied for cognitive and behavioural disturbances in chronic cerebral disorders of the elderly, where a Cochrane review found some short-term memory/behaviour benefit but noted evidence limitations ^{2Reference 2Fioravanti M · 2005Systematic reviewCytidinediphosphocholine (CDP-choline) for cognitive and behavioural disturbances associated with chronic cerebral disorders in the elderly — systematic reviewView study →}. It has additionally been trialled in acute ischaemic stroke and other neurological settings; results there are mixed and are not covered in this quick pass. Marketing often implies broad “focus” and “energy” benefits in healthy young adults — that specific claim was not backed by a citable trial in this pass.

Dosage & Safety

Studied doses commonly fall around 250–500 mg/day; the memory trial above used 500 mg/day ^{1Reference 1Nakazaki E et al. · 2021RCTCiticoline and Memory Function in Healthy Older Adults — randomised controlled trialView study →}. This is not a personal recommendation. Citicoline was generally well tolerated in trials. Drug interactions, pregnancy/lactation safety and long-term use were not assessed in this pass — treat as not established here.

References

1. Nakazaki E, et al. (2021). Citicoline and Memory Function in Healthy Older Adults — randomised controlled trial. The Journal of Nutrition. https://pubmed.ncbi.nlm.nih.gov/33978188/
2. Fioravanti M, Yanagi M. (2005). Cytidinediphosphocholine (CDP-choline) for cognitive and behavioural disturbances associated with chronic cerebral disorders in the elderly — systematic review. Cochrane Database. https://pubmed.ncbi.nlm.nih.gov/11034681/