Menthol is an organic compound made synthetically or obtained from the oils of corn mint, peppermint, or other mints. It is a waxy, crystalline substance that is clear or white in color. Natural menthol is obtained by freezing peppermint oil, which forms crystals of menthol which are then separated by filtration. Menthol Crystals have a strong scent of mint and is known to have a cooling effect on skin.