When medical researchers use the term Lecithin, they are referring to a purified substance called phosphatidyl choline (PC) that belongs to a special category of fat-soluble substances called phospholipids.Where is it found ?Choline, the major constituent of PC, is found in soybeans, liver, porridge, cabbage, and cauliflower. Soybeans, egg yolks, meat and some vegetables contain PC. Lecithin (containing 10-20% PC) is added to many processed foods in small amounts for the purpose of maintaining texture consistency. (size H)