While it's quite true that there's nothing healthier than including fresh produce in your diet, there is actually another reason why doctors insist on a healthy diet of fresh fruits and vegetables. The answer may lie in antioxidant foods. Antioxidant foods are powerful scavengers of free radicals. The function of antioxidant foods is to hunt down free radicals and destroy them. They are disorders - unnatural conditions of the body. Aging is caused by harmful molecules called "free radicals." This was according to Denham Harman, M.D., Ph.D., who first proposed the theory in the 1950s. Since then, scientists and researchers have sought to understand the body's oxidation process and free radicals contribute in its acceleration. During the research, the group tested the ability of the antioxidant red grapes Activin in neutralizing and inhibiting the damage caused by fee radicals in the brains and livers of mice. Afterwards, they then compared the effects of the new antioxidant red grapes compound to the more popular antioxidants - vitamins E, C, and beta-carotene. The first ever antioxidants to catch the attention of scientists and the vitamin supplement industry is beta-carotene or more commonly known as Vitamin A. Now, you can find antioxidant supplements in the form of Vitamin A capsules in almost any pharmacy or health food store. Beta-carotene antioxidant supplements generally come from orange, yellow, and green leafy vegetables and fruit. Due to the lack of sufficient data to support the success of antioxidant vitamins supplement against cardiovascular diseases and other such degenerative illnesses, the American Heart Association does not recommend using antioxidant vitamins supplements. However, they do not want to put a stop to our continued taking of antioxidant vitamins, the ones found in nature and in the foods that we eat. Principal researcher Nicki Engeseth, a professor of food chemistry in the University of Illinois College of Agricultural, Consumer, and Environmenal Sciences, agrees with this. Published online on April 6 in the Journal of Agricultural and Food Chemistry, the newest study on dietary antioxidants was the first to look at honey's effect on human blood.