Phospholipids are necessary components of cell membranes.
PS is found in high concentrations in the brain, and may be needed to support mental function. 1 Phosphatidylserine works together with other phospholipids to build cell membranes. PS is found in small amounts in normal diet, usually only in the minute bit present in lecithin. Adults over age 50 are most likely to show a deficiency. Phosphatidylserine appears to increase the number of neurotransmitter receptor sites in the brain.