Lecithin is a fat-like substance that is extracted from soybeans, eggs, and other sources. It is a mixture of phospholipids, which are essential components of cell membranes. In protein powders, lecithin is commonly used as an emulsifier to help prevent clumping and to improve the mixability of the powder.
Lecithin is also a source of choline, which is an essential nutrient that is important for brain function, liver health, and muscle movement. Choline is needed to make acetylcholine, a neurotransmitter that is involved in many functions in the body, including memory and muscle control.
Overall, lecithin is generally considered safe to use in small amounts as an ingredient in protein powders. However, people with soy or egg allergies should avoid protein powders that contain lecithin sourced from these ingredients.