Black turmeric is a rare herb. It is the underground portion of the stem, or rhizome, of the Cucurma caesia plant. Black turmeric offers benefits similar to the orange variety, but the darker cultivar contains higher concentrations of curcumin than any other Curcuma species.

Black Turmeric is a powerful antioxidant and anti-inflammatory. It has anti-bacterial and anti-fungal properties, and is laxative. It is used as a tonic for the brain and the heart. Furthermore, the smooth muscle relaxant, anti-tumour and anti-oxidant properties of Curcuma Caesia rhizome extract had been reported.