Citicoline (CDP-Choline)

What it is

Citicoline is a compound the body makes naturally on the way to building phosphatidylcholine, a key component of brain cell membranes. It's sold as a supplement in the U.S. and used as a prescription drug in some other countries.

How it works

When you take citicoline, it breaks down into choline and cytidine (which the body converts to uridine), both building blocks the brain uses to make phosphatidylcholine for cell membranes. Choline is also needed to make acetylcholine, a messenger involved in memory and attention. The idea is that extra supply may support brain cell maintenance and signaling, but how much this matters in people who aren't deficient is uncertain.

What it's been studied for

Commonly taken for memory, attention and focus, particularly by older adults.

What the evidence shows

Modest and specific: a Cochrane review found some evidence of short- to medium-term benefit for memory and behavior in older adults with chronic cerebral disorders, largely vascular-related cognitive problems, and a 12-week trial in healthy older adults with age-related memory complaints found improved episodic memory. Evidence in healthy younger adults is limited, a large trial in acute stroke found no benefit, and a 2024 European food-safety review concluded a memory benefit in healthy people had not been established.

Who should consider it

The most relevant research is in older adults, including those with age-related memory complaints or vascular-related cognitive issues, so they're the group most likely to notice a modest effect. Healthy younger adults hoping for a noticeable focus boost have limited evidence to go on. Anyone with new or worsening memory problems should see their provider first, since some causes — thyroid issues, B12 deficiency, medication effects — are very treatable.

Amounts commonly studied

Studies typically used 500 to 2,000 mg per day; the trial in healthy older adults used 500 mg daily for 12 weeks.

How to take it

Studies typically used 500 to 2,000 mg per day, either once daily or split, for weeks to months; the healthy older adult trial ran 12 weeks at 500 mg. It can be taken with or without food, but taking it earlier in the day may help if it affects your sleep. Talk to your provider if you have Parkinson's disease or take medications for memory or mood.

Forms & absorption

Sold as citicoline or citicoline sodium in capsules and tablets, and it's well absorbed by mouth. It's a different product from choline bitartrate or alpha-GPC, though all supply choline.

Food sources

None as citicoline itself, but the body makes it from choline, which is found in eggs, meat, fish, poultry, dairy, soybeans and cruciferous vegetables like broccoli.

Safety & interactions

Generally well tolerated; headache, stomach upset, trouble sleeping or restlessness are occasionally reported. It may enhance the effects of levodopa, so people with Parkinson's disease should use it only with their provider's guidance, and safety in pregnancy and breastfeeding isn't established. New or worsening memory problems deserve a medical evaluation rather than self-treatment.

Common questions

Will citicoline help me focus at work?

A few small studies in healthy adults suggest possible effects on attention, but the evidence is limited. If you try it, keep expectations modest and pay attention to sleep, which has a far bigger effect on focus.

How is it different from other choline supplements?

Citicoline supplies both choline and cytidine, while choline bitartrate supplies only choline and alpha-GPC is another choline-containing compound. They haven't been compared head-to-head well enough to say one is clearly better.

Is it safe to take long term?

It's been well tolerated in studies lasting months, and serious side effects are uncommon. Long-term data are more limited, so it's worth reviewing with your provider, especially if you take other medications.