Soy Lecithin Powder (e322) is an emulsifying agent that helps fat and water stay together. A natural phospholipid from soybean, Soy lecithin is partially water-soluble, an emulsifying agent that helps fat and water stay together. Therefore, it is often added to foods, such as chocolate, cheese, margarine, and salad dressing. It has health benefits such as reducing cholesterol level.