Supports Brain Function Cognizin Citicoline Dietary Supplement Citicoline [stabilized CDP Choline (cytidine 5'diphosphocholine)] is a naturally occurring intermediate involved in the synthesis of phosphatidylcholine, a major constituent of the grey matter of brain tissue (30%). Citicoline consumption promotes brain metabolism by enhancing the synthesis of acetylcholine and restoring phospholipid content in the brain, both of which positively affect memory and other brain activity.