Excerpts from the report: Most of the world's supply of peppermint and spearmint oils comes from mint grown in Indiana, Michigan, Oregon, Washington, and Wisconsin. The oil is the principal product of the mint crop, although fresh and dried mint leaves are used in the preparation of foods and beverages. As mint oil is used in only a few products, the market for peppermint and spearmint oils will continue to be steady, although not in great demand. Peppermint oil is used to flavor chewing gum, candy, toothpaste, and medicine, in which the oil masks unpleasant flavors and odors. Spearmint oil has a smaller market and is used mostly to flavor chewing gum and toothpaste.