Full profile
| Also known as | CDP-choline, Cytidine diphosphate-choline |
|---|---|
| Best for | Focus · Mental energy · Attention on demanding days |
| Evidence grade | Grade B — Moderate — several human trials, some mixed results |
| Studied dose range | 250–500 mg per serving in many studies. |
| Time to effect | Some acute studies; often positioned as daily-use over weeks. |
| Best form | Cognizin is a commonly referenced branded citicoline form. |
Evidence, honestly graded
Several human trials in various populations report attention and memory measures. Dose and population differences make direct comparison difficult.
See the full grading rubric — study type, replication, population match, and dose adequacy — in The Evidence Standard.
Side effects
- Generally well tolerated
- Occasional headache or GI discomfort reported
Who should avoid it or check first
- Pregnant or breastfeeding without clinician guidance
Interactions
- Discuss with a clinician if taking medications affecting acetylcholine pathways
Stacks well with
- L-Theanine
- Bacopa Monnieri
Use caution stacking with
- Redundant to combine multiple high-dose choline sources without rationale
What to look for on a label
- Check the elemental citicoline dose per serving.
- Branded forms should be named and dosed transparently.
References
- McGlade E, Locatelli A, Hardy J, et al. (2012). Food and Nutrition Sciences, 3(6):769–773Fewer commission errors on a sustained-attention test versus placebo at both doses.
- Nakazaki E, Mah E, Sanoshy K, et al. (2021). The Journal of Nutrition, 151(8):2153–2160Improved episodic memory measures versus placebo in a healthy older sample.
Grades and studied doses are our conservative reading of the human research, shown for education. They are not product claims, and a studied dose is not a recommended dose.
See how Citicoline compares on grade, dose, and goal in the Evidence Explorer.