Steam Distilled Cornmint Essential Oil can contain up to 83% menthol. However, most Cornmint Oil has been fractionated (dementholized) to remove a large percentage of the menthol. The resulting dementholized oil, therefore, is not commonly used within holistic aromatherapy. Peppermint Essential Oil is preferred for aromatherapy applications. \nWithin fragrancing and soapmaking applications, however, Cornmint can be a practical substitute for Peppermint Essential Oil due to its lower cost.Cornmint Essential Oil is sometimes passed off as Peppermint Oil, so it is important to be careful of where you procure your oil.