Turmeric oil [INCI: Curcuma longa] Turmeric oil is obtained by steam distillation or solvent extraction of the powdered rhizome of species of the genus Curcuma (family: Zingiberaceae). Of these species, Curcuma longa is the most well known. Curcuma longa yields 0.3-7.2% (usually 4-5%) of turmeric oil following steam distillation. The chief constituents of the essential […]