Menthol crystals are crystallized menthol oil. Menthol is an essential oil derived from a variety of mint plants. Peppermint contains the highest concentration of Menthol. To crystallize menthol oil, manufacturers deep freeze it, which turns it into waxy, dissolvable crystals. This results in a concentrated and convenient way to store and use menthol. Menthol crystals are intended as an additive and are not intended for use as a single ingredient without dilution. Pure menthol can cause skin burns and other serious medical conditions. Our menthol comes in its raw, crystalline form and has a strong minty scent. Do not consume raw menthol crystals!* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.