Lecithin is a natural phospholipid emulsifier, the ingredient that helps oil and water stay together in dressings, plant butters, chocolate, and foams. In the Alchemy food library, Lecithin refers to soy lecithin extracted from soybeans, available as liquid, powder, or granules. For sunflower-derived lecithin, use Sunflower Lecithin (food #635) instead.