Turmeric (Curcuma longa) essential oil is steam distilled from the bright yellow-orange rhizome. (Rhizomes are horizontal, underground stems that sprout both vertical roots and stems to propagate perennial plants.) Turmeric is a pungent herb commonly used to season savory dishes in its native India. The essential oil likewise has a warm, earthy, and spicy aroma. Turmeric properties: analgesic, anticonvulsant, anti-inflammatory, antimicrobial, antimutagenic, antioxidant, antitumor, and insecticidal.