NOW Foods? Curcumin is the principle bioactive component of Turmeric (Curcuma Longa). Although it has been used for centuries by Ayurvedic herbalists, modern scientific research has demonstrated Curcumin's potent free radical scavenging properties, as well as its ability to support the body's proper response to biological stress. By helping the body to protect itself from these stressors, Curcumin may support a healthy digestive system and the maintenance of normal cell reproductive cycles.