CDP-Choline (Citicoline)
Nootropic choline source supporting brain energy and neuroprotection.
By Suplagen Team · Updated
What it is
Citicoline (CDP-choline) provides both choline and cytidine, supporting acetylcholine synthesis and phospholipid membrane repair.
How it works
Donates choline for acetylcholine; cytidine converts to uridine supporting neuronal membrane phospholipid synthesis.
What the evidence says
Moderate evidence for attention and memory support; strong safety profile across clinical trials.
How much to take
The catalog range is 250 to 500 mg daily, and 500 mg is also the ceiling. Citicoline is one of the few nootropics where the studied doses and the safe doses line up neatly, backed by a strong safety record across clinical trials.
Start at 250 mg. If attention and recall don't budge after a few weeks, 500 mg is the top of the range. Going past it adds choline you don't need and, for some people, a headache.
When and how to take it
Morning, with or without food. Its effects on attention favor the working day, so there's no reason to take it at night.
Don't stack it with Alpha-GPC: both supply choline, and the overlap tends to produce headaches and GI complaints rather than extra focus. The comparison explains which one fits you. Citicoline is the pick if choline sources give you a fishy body odor.
Who should skip it
Two medication classes to respect: cholinesterase inhibitors (used in dementia care) interact at a moderate level, and levodopa mildly. Anyone on either needs a doctor's sign-off. There are no listed contraindicated conditions, and pregnancy safety isn't established, so the cautious default applies.
Safety Notes
- Generally well-tolerated. Preferred over Alpha-GPC for those sensitive to trimethylamine (fishy odor).
- cholinesterase inhibitors: Additive cholinergic effects; consult physician.
- levodopa: May enhance levodopa effects; monitor.
Timing With Other Supplements
- Alpha-GPC: Both provide choline; combining may cause excess choline symptoms (headache, GI).
Common questions
What is the best time to take CDP-choline?
Morning. Its attention and memory support suits the hours you're working, and there's no benefit to evening dosing. With or without food, either works.
What is a typical CDP-choline dosage?
250 to 500 mg once daily. Trials cluster in that range, 500 mg is the catalog ceiling, and there's no evidence that more helps.
Does CDP-choline affect dopamine?
Not directly. Citicoline donates choline for acetylcholine and supports neuronal membranes; its studied effects are attention and memory. If you take levodopa, the mild interaction is worth a conversation with your doctor.