Stearic acid is an emulsifier and a type of fatty acid that occurs naturally in some foods; others are oleic acid, lauric acid, myristic acid and palmitic acid. In cosmetics and personal care products, these fatty acids are used in cleansing creams, soaps and pastes. We use stearic acid in our products to help bind ingredients together and keep a formula from separating. Over time, it is possible for formulas in a product to separate. We add emulsifiers to our products where needed to ensure that products provide the same performance use after use.