Menthol Crystals are natural, solid crystals obtained from mint oils, mainly from the peppermint plant, Mentha piperita. They have a strong, refreshing minty aroma and are known for their cooling and soothing effect. Menthol crystals are widely used in medicines, cosmetics, balms, inhalers, and aromatherapy products to help relieve congestion, reduce pain, and provide a cooling sensation. They must be diluted before use because they are highly concentrated.