In the culinary world, antioxidants help prevent food from becoming rancid or discolored. But in diet world, many scientists believe that they may contribute to the reduction of cancer and heart disease. Ascorbic Acid (Vitamin C), which is easily obtained from citrus fruits, is a well known antioxidant along with fellow vitamin E which is abundant in seeds and nuts. Big time hoarders of antioxidants are cruciferous vegetable such as broccoli and Brussels sprouts – eat your greens, folks!