diosphenol

Spearmint or spear mint (Mentha spicata) is a species of mint native to much of Europe and southwest Asia, though its exact natural range is uncertain due to extensive early cultivation.

Peppermint (Mentha × piperita, also known as M. balsamea Willd.) is a hybrid mint, a cross between watermint and spearmint. The plant, indigenous to Europe, is now widespread in cultivation throughout all regions of the world. It is found wild occasionally with its parent species. Fresh or dried peppermint leaves are often used alone or with other herbs in herbal teas (tisanes, infusions). Peppermint is used for flavouring ice cream, confectionery, chewing gum, and toothpaste, and can also be found in some shampoos, soaps and skin care products. Menthol activates cold-sensitive TRPM8 receptors in the skin and mucosal tissues, and is the primary source of the cooling sensation that follows the topical application of peppermint oil. Peppermint has a high menthol content. The oil also contains menthone and carboxyl esters, particularly menthyl acetate. Dried peppermint typically has 0.3–0.4% of volatile oil containing menthol (7–48%), menthone (20–46%), menthyl acetate (3–10%), menthofuran (1–17%) and 1,8-cineol (3–6%). Peppermint oil also contains small amounts of many additional compounds including limonene, pulegone, caryophyllene and pinene. Peppermint also contains terpenoids and flavonoids [Wikipedia]