We use oil that is distilled from peppermint grown in Yakima, Washington, one of the highest quality peppermint oils in the marketplace. Its familiar aroma is strongly piercing, refreshing, minty and very herbaceous. Among its known properties are: Cooling, decongestant, deodorant, insecticide and stimulant. Should be kept away from eyes as it is likely to irritate skin and mucous membranes. Best avoided by pregnant women and nursing mothers as it could discourage flow of milk. Helps people become clear headed and refreshes the spirit. Helpful for people who are unable to concentrate or who have mental fatigue. It cools skin when hot and is warming when cold. Can reduce skin irritation or itching when used in an appropriate dilution.JK Naturals uses peppermint essential oil in our Peppermint & Tea Tree deodorant stick, our Peppermint & Tea Tree lip balm, and our Fabulous Foot Butter.