Curcumin is the active compound of the popular Indian spice turmeric (also known as curry powder in western countries). From ancient times to today, turmeric has been used in Indian subcontinents to not only spice up and preserve food but also as a traditional remedy to heal many diseases. It is also used in textiles as a yellow die. Curcumin is the key ingredient in turmeric and its chemical structure is the reason for the bright yellow color of turmeric. Botanically, it is a relative of the ginger family.