Phosphatidylserine (PS) is an important phospholipid which is also termed as brain phospholipid & plays a key role in physiological functioning of nervous cells. It is available in powdered form. PS is the single most important building block nutrient for healthy, active, and functional brain cells. Levels of PS in the brain determine how long stress can be tolerated. Dietary supplementation with PS can improve symptoms of decline in memory, learning, concentration, coordination & mood. Hence it is used in the preparation of brain health medicines.