NOW 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 it 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.* Natural color variation may occur in this product.