Lecithin is a naturally occurring substance that plays a vital role in both biological systems and industrial applications. It is a complex mixture of phospholipids, glycolipids, and triglycerides that serve as essential building blocks of cell membranes in all living organisms. Derived mainly from plant sources such as soybeans and sunflower seeds, lecithin is valued for its remarkable emulsifying, stabilizing, and dispersing properties, which make it indispensable across a wide range of industries including food, nutraceuticals, pharmaceuticals, and cosmetics.