Lecithin is a fatlike substance called phospholipid. It is composed mostly of B vitamins, phosphoric acid, choline, linoleic acid and inositol. Lecithin contains all the phosphatides found naturally in cell membranes. Lecithin works by maintaining cell membrane structure and increasing cell membrane fluidity. Each Lecithin softgel capsule provides you with 1200 mg of natural lecithin extracted from soybeans.