Soy lecithin is a food additive that comes from soy and is used as an emulsifier, lubricant, antioxidant, and flavor protector in many food products. It is generally safe and present in small amounts in food, so it is unlikely to be harmful. Soy lecithin contains trace levels of soy proteins, including soy allergens, but it does not contain sufficient soy protein residues to provoke allergic reactions in the majority of soy-allergic consumers. Soy lecithin is also sold in supplement form and is known to boost immunity, aid in easing menopausal symptoms, lower blood pressure, improve cholesterol levels, and help with stress-related disorders. However, the extraction process for soy lecithin uses hexane, a chemical solvent that is also used in varnishes and glue, which can be a concern for some people. Overall, soy lecithin is a generally safe food additive that is widely used in the food industry and can also be found in dietary supplements.