Citicoline
Also known as CDP-choline, Cytidine diphosphate-choline, Cognizin
Citicoline (CDP-choline) is a compound that supplies both choline, a precursor to the neurotransmitter acetylcholine, and cytidine, which the body converts to uridine. It is used as a nootropic for attention and memory and has been studied for cognitive support in aging and after stroke. Evidence is strongest for attention and clinical recovery settings, and more preliminary in healthy young people.
Benefits
Supports attention and focus
ModerateTrials report improved attention and reduced cognitive impulsivity, including in healthy adults and adolescents at moderate doses.
May aid memory in older adults
ModerateHas shown benefits for memory and cognition in age-related decline and post-stroke recovery in several studies.
Provides building blocks for brain membranes
PreliminarySupplies choline and cytidine/uridine used to synthesise phosphatidylcholine, a major component of neuronal membranes.
Pros & cons
Pros
- Good evidence for attention
- Dual choline and uridine precursor
- Generally well tolerated
- Branded forms (Cognizin) are well studied
Cons
- Evidence in healthy young adults is thinner
- More expensive than basic choline sources
- Effects can be subtle
Side effects
Mild digestive upset
Occasional nausea, stomach discomfort, or diarrhea, usually mild.
Headache or insomnia
Some people report headache or trouble sleeping, particularly with late or high doses.
How to take it
Typical dose
250–500 mg per day (up to 2,000 mg in clinical studies)
Timing
In the morning or early afternoon, with or without food
Common forms
Tip: Citicoline and alpha-GPC are the two most bioavailable choline sources for the brain. Avoid late-day dosing if it disturbs your sleep.
What the research says
Citicoline and attention
ModerateRandomized trials report improved attention and psychomotor speed in healthy adults and adolescents.
Citicoline and age-related cognition
ModerateReviews suggest benefits for memory and cognition in older adults and in post-stroke recovery.
How it connects
Relationships between Citicoline and other supplements in the matrix.
Citicoline supplies choline while uridine supplies the nucleotide; combined with omega-3 DHA they form the classic membrane-synthesis stack.
Compare the pairingDHA and a choline source like citicoline are used together to build neuronal membrane phospholipids.
Compare the pairingCiticoline raises the supply of acetylcholine while huperzine A slows its breakdown, a complementary cholinergic pairing.
Compare the pairingFrequently asked questions
What is Citicoline used for?
Citicoline is most commonly used for focus, memory, and energy. Trials report improved attention and reduced cognitive impulsivity, including in healthy adults and adolescents at moderate doses.
How much Citicoline should I take?
A typical dose is 250–500 mg per day (up to 2,000 mg in clinical studies). Citicoline and alpha-GPC are the two most bioavailable choline sources for the brain. Avoid late-day dosing if it disturbs your sleep. Start at the lower end and confirm the right dose for you with a healthcare professional.
When is the best time to take Citicoline?
Recommended timing: In the morning or early afternoon, with or without food.
What are the side effects of Citicoline?
Reported side effects include mild digestive upset and headache or insomnia. Occasional nausea, stomach discomfort, or diarrhea, usually mild.
Who should be careful with Citicoline?
Use caution if you have bipolar disorder, as cholinergic agents may affect mood. Speak with a healthcare professional if any of these apply to you.
Important cautions
- Use caution if you have bipolar disorder, as cholinergic agents may affect mood.
- Talk to a clinician before combining with medications that affect acetylcholine.
More Nootropics
Caffeine
The world's most popular cognitive stimulant.
Huperzine A
A plant alkaloid that slows acetylcholine breakdown for memory.
Uridine
A nucleotide studied for memory, mood, and brain membranes.
Compare Citicoline with
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