The brain and nervous system require a steady supply of specific nutrients to function optimally — including phospholipids, B vitamins and certain amino acids. Substances such as phosphatidylserine, citicoline and acetyl-L-carnitine are studied for their role in cognitive function, concentration and nerve cell metabolism. This category is relevant for those who want to support everyday mental sharpness, not as treatment for neurological conditions.








Substances like phosphatidylserine and citicoline are studied for their role in cognitive function and concentration, but effects vary between individuals and this is not a treatment for memory disorders.
Caffeine provides a fast, short-lived stimulant effect. Citicoline is instead studied for its role in nerve cells' long-term metabolism and membrane health.
They're popular in such contexts since the category focuses on concentration and mental stamina, but should complement good sleep rather than replace it.