Citicoline is not a vitamin. Chemically, it is CDP-choline (cytidine-5'-diphosphocholine), a compound related to choline metabolism and membrane phospholipid pathways.\n\nVitamins are essential micronutrients required in specific amounts. Citicoline is a targeted supplemental compound, often discussed in relation to cognitive support and neuronal membrane metabolism.\n\nIts relevance depends on diet (choline intake), sleep/stress, existing conditions, and medications. It should not be framed as a “vitamin everyone needs.”\n\nBottom line: citicoline is not a vitamin; it is CDP-choline, a supplement used selectively.