Naturally Occurring Phosphatidyl Choline and Other Phosphatides NOW Sunflower Lecithin Powder has phosphatidyl choline, the most abundant phospholipid in the cell membrane. It also naturally abounds in phosphatidyl inositol, phosphatidyl ethanolamine, and essential fatty acids. Lecithin aids in emulsifying fats, enabling them to be dispersed in water. NOW Sunflower Lecithin Powder is soy free and non-GMO.