Cognitive Health Supports Memory and Brain Function Promotes Intercellular Communication A Dietary Supplement General Health Family Owned Since 1968 GMP Quality AssuredNOW Phosphatidyl Serine is a phospholipid compound derived from soy lecithin that plays an essential role in cell membrane composition and intercellular communication. Phosphatidyl Serine is a major structural component of neural membranes where is assists in the conduction of electrical impulses and facilitates the activity of neurotransmitters involved in learning, memory, and mood. These properties make NOW Phosphatidyl Serine an ideal supplement for the support of cognitive function.