Black turmeric is a rare herb. It is the underground portion of the stem, or rhizome, of the Cucurma caesia plant. Black turmeric contains the highest concentrations of curcumin of any plant species. It is a powerful antioxidant and anti-inflammatory. The root has been used medicinally for centuries to treat arthritis, asthma, and epilepsy. Black turmeric root is crushed and can be applied to bruises and sprains to ease discomfort or applied to the forehead to help relieve symptoms of migraines. Black turmeric can be peeled, the and cut into chunks, then blended along with kale, ginger, lemon and cucumber for a health-boosted green smoothie. Dried Black turmeric will keep in an airtight container for up to six months.