Turmeric (Curcuma longa) is a rhizomatous herbaceous perennial plant of the ginger family, Zingiberaceae. It is native to tropical South Asia and needs temperatures between 20 deg C and 30 deg C (68 deg F and 86 deg F) and a considerable amount of annual rainfall to thrive.
Turmeric is currently being investigated for possible benefits in Alzheimer's disease, cancer, arthritis, and other clinical disorders. As an example of preliminary laboratory research, turmeric ameliorated the severity of pancreatitis-associated lung injury in mice.
According to a 2005 article in the Wall Street Journal, research activity into curcumin and turmeric is increasing. The U.S. National Institutes of Health currently has registered 61 clinical trials completed or underway to study use of dietary curcumin for a variety of clinical disorders (dated June 2011). [Source: Wikipedia]
USDA Database for the Oxygen Radical Absorbance Capacity (ORAC) of Selected Foods, Release 2 - Prepared by Nutrient Data Laboratory, Beltsville Human Nutrition Research Center (BHNRC), Agricultural Research Service (ARS), U.S. Department of Agriculture (USDA) - May 2010