The main function of perfumes and essences in cosmetics is to produce pleasant odors and mask the odor of the product matrix. Products with the same base often only need to simply change the flavors used to become products that are popular with customers. Some old products will also establish new images due to changes in flavors, packaging and advertising and become best-selling products.

In personal care products, flavor mainly play the role of scenting products and have aesthetic value. In addition to scenting, flavors have other useful functions. Since the human senses of smell accept the smell of essences, and the senses are closely related to the emotional part of the brain, essences have a great influence on human emotions.