PHOSPHATIDYLSERINE (PS) is a specialized type of lecithin known for its positive effects on memory. Studies indicate that PS is especially useful for quality of life improvements, such as remembering names and faces, and remembering where you left your keys. In fact, it may even reverse many of the effects of brain aging and restore youthful brain function. In addition to providing vital lipid components of brain cell membranes, PS plays a role in: