Glyceryl stearate is a synthetic ester derived from stearic acid and glycerin. It is used in the cosmetics industry as an emulsifier and consistency agent in personal care products. Glyceryl stearate allows water-insoluble ingredients to be mixed with water-soluble ingredients, making it easier to create stable creams and lotions. It also helps soften and hydrate the skin by forming a protective barrier. Glyceryl stearate is commonly used in moisturizers, body lotions, lip balms, and other skin care products.