Support memory and concentration with soy-free Phosphatidylserine from Olympian Labs. Phosphatidylserine (PS) is a phospholipid found in all cells. It is a major component of cell walls (membrane) in the brain. Cell membranes surround the cell keep it intact and regulate many vital cellular functions including the storage release and activity of many important neurotransmitters (brain chemicals) and their receptors. Phosphatidylserine is also important in cell-to-cell communication. PS stimulates the release of dopamine (a mood regulator that also controls physical sensations and movement) increases the production of acetylcholine (necessary for learning and memory) enhances brain glucose metabolism and maintains healthy levels of cortisol (a stress hormone).