Soya lecithin is a food additive used by the food industry to aid the emulsification of fats in processed foods.Lecithin has an indispensable role in regulating the flow of nutrients and waste materials in and out of the cell. For decades now, lecithin has been popular for treating patients with high cholesterol. It has been seen to prevent the build-up of fats and bad cholesterol in the walls of the heart, the arteries and the veins, thereby promoting cardiovascular health.