An Oxygen Radical Absorbance Capacity (ORAC) score is an analysis that measures the antioxidant levels of food and other chemical substances. If a food has a high ORAC score, then it means the food is high in antioxidants. The antioxidant's strength is its ability to eliminate oxygen free radicals. With the ORAC score, a higher score means the food is better at helping us fight diseases such as heart disease and cancer. Foods with a high ORAC score are better able to protect cells and their components from oxidative damage. Oxygen radicals are chemicals that form naturally inside the body through the process of oxidation. Everyday functions such as digestion and physical activity produce oxygen radicals. Daily exposure to polluted air, rancid food and oxidizing radiation from the sun and electrical appliances also contribute.