Cosmetics are generally products or substances that you apply on your skin. They include moisturizers, hair conditioners, nail polish, perfumes, emulsifiers and pigments among others. Different cosmetics contain different ingredients including inert materials, botanical substances, and essential oils among others. Cosmetology is the study and application of beauty treatment. Specialties include a lot of practices including skin care, cosmetics, hairstyling, manicures and pedicures, and electrology.