Menthol is extracted from Peppermint essential oil. In the collective imagination, it is associated to a sensation of freshness: in fact, the cold sensation we feel while chewing gum is activated in the brain by a molecule, TRPM8, a protein that allows calcium ions to flow to the nervous cells that send this impulse.
In the cosmetic field, Menthol is used for its vasoconstrictive action on the peripheral circulation: in fact, through this mechanism, it generates a turgid effect in the treated areas.