Wintergreen Essential OilWintergreen (Gaultheria procumbens) Wintergreen is sometimes mistakenly believed to be a member of the mint family partly because it possesses a strong, crisp, mint like aroma, but it is part of the Willow family that contains aspirin like properties. Wintergreen Essential Oil is typically composed of at least 96% methyl salicylate, an ester that can be toxic when not used with great care. Wintergreen Essential Oil is excellent for its ability to