Organic Menthol Crystals are naturally obtained from crystallized Organic Mentha Arvensis (Peppermint) Essential Oil, which is derived from the steam distillation of the Peppermint herb. Menthol crystals are used at a rate of 1.5% to 2%. Crush the menthol crystals and dissolve them in your essential oil blend to add to the cream during the cool down phase. Add to your oil phase in a salve.