Turmeric has been used in south Asian countries and India for centuries. But Turmeric rhizome powder, Turmeric tincture, Turmeric CO2 extract and Turmeric essential oil have vastly different chemical compositions and applications. For example, curcumin, a notable compound extracted from the rhizomes of Turmeric, is found in Turmeric CO2 extract, but not in the essential oil.[2] The aroma of the CO2 and essential oil are dominated by several powerful ketones called tumerones. In aromatherapy, ketone molecules are excellent solvents and are highly volatile – this is why many ketone-rich oils are used in targeted skincare and cosmetic formulas and are often considered top notes in natural perfumery.