Lecithin
Lecithin is a mixture of phospholipids and related compounds found naturally in many tissues and foods. Lecithin is most commonly used as a food additive and supplement ingredient because it acts as an emulsifier, which helps mix fats and water components. In commerce, lecithin is often derived from soybeans or egg yolk.
Composition
Lecithin typically contains phosphatidylcholine and other phospholipids such as phosphatidylethanolamine. Lecithin preparations may also include minor components depending on the extraction source and processing method.
Common Uses
Lecithin is used in processed foods to improve texture and stability by reducing separation of oil and water phases. It is used in baking and confectionery products to support mixing and consistency.
Clinical and Nutritional Role
Lecithin provides dietary phospholipids that contribute to normal cell membrane structure. Supplemental lecithin is marketed for various health effects, but routine use beyond dietary needs is not established as a standard medical therapy.
Safety Considerations
Soy-derived lecithin may be a concern for patients with soy allergy. Product labeling should be reviewed to identify the source (soy vs egg) and any added ingredients.