NOW Soy-Free Phosphatidyl Serine is a phospholipid compound derived from Non-GMO sunflower lecithin. Phosphatidyl Serine plays an essential role in cellmembrane composition and intercellular communication. It is an especiallyimportant structural component of nerve cell membranes, where it assists inthe conduction of electrical impulses and facilitates the activity ofneurotransmitters involved in learning, memory, and mood. Sharp PS GREEN is aregistered trademark of Enzymotec Ltd. Natural color variation may occur inthis product.