Phosphatidylserine is a chemical that is important for many functions in the human body, especially in the brain. Small amounts are found in most foods.

Phosphatidylserine is part of the cell structure in the body. The body can make phosphatidylserine, but most of what it needs comes from foods. It can also be taken as a supplement. These supplements were once made from cow brain. Now they are commonly made from cabbage or soy.

Phosphatidylserine is used for Alzheimer disease and normal age-related decline in memory and thinking skills. It is also used for athletic performance, ADHD, and many other purposes.