Often found in mouthwashes, toothpaste, balms, and a host of other products, menthol is the primary active ingredient in essential oil of peppermint that provides the familiar cooling sensation and minty odor and taste. Menthol crystals are produced by rapidly cooling the essential oil of peppermint. 9 Powerful benefits of menthol crystals. Menthol crystals can be used to alleviate nausea, especially when the nausea is due to motion sickness. This is because peppermint (which is used in making menthol crystals) is a natural carminative herb, allowing it to settle the digestive system. Menthol is a compound obtained from Peppermint Oil. The anti-fungul and anti-bacteria action of Menthol has been studied extensively. Menthol Crystals finds diverse applications because of its characteristic aroma, flavor, and its cooling effect. Menthol Crystals can be used in perfumes, cosmetics, analgesic balms, lotions, creams, shampoos and conditioners. Recommended usage level is 0.5 - 8 %. All products are imported from the USA. HOW TO USE MENTHOLCRYSTALS - Adding menthol crystals to hot water and inhaling the vapors can begin to soothe congestion and irritated nasal or throat passages. Before getting in the shower, try dissolving some menthol crystals in a little water and add a few drops to the shower walls.