Emollients are moisturizing ingredients used in cosmetics and skin care products. They work by forming a protective film on the skin to trap moisture. Common emollients include shea butter, mineral oil, and various plant oils. Emollients are available as creams, lotions, ointments, and soap substitutes. They should be applied regularly, especially after bathing, to keep skin well moisturized. Possible side effects can include irritation or folliculitis, though emollients are generally well tolerated when used as directed.