Menthol is a chemical agent, menthol is extracted from the leaves and stems of peppermint, white crystals, molecular formula C10H20O, is the main component of peppermint and peppermint essential oils. In the world, China and Brazil are the main natural mint producers, and the annual output of mint oil both reaches 2000-3000t. Both menthol and racemic menthol can be used as a flavoring agent for toothpaste; perfume; beverage and candy. It is used as a stimulant in medicine and acts on the skin.