Lecithin is a mixture of naturally occurring phospholipids, fatty substances that are major components of all cell membranes. It is used commercially as a natural way to stabilize liquid mixtures. One of the primary phospholipids, phosphatidylcholine is present in lecithin products at concentrations ranging from 20% – 90%, depending on whether the lecithin is derived from plant or animal sources. For use in dietary supplements, lecithin is produced mainly from plants, such as soybean, which contains around 20% phosphatidylcholine 1. Lecithin is approved by the U.S. Food and Drug Administration (FDA) for human consumption with the status generally recognized as safe (GRAS) (21CFR184.1400) 2.