Whenever possible, we should try to get our antioxidants and other essential vitamins and minerals through our diet. A proper diet is necessary to offset the signs of aging and the foods listed here tend to be healthier than a burger and fries. However, it is not always possible to eat enough of the foods in the proper form, e.g. raw, and we never know if the food in question has enough of the essentials we need (maybe due to soil depletion) so taking supplements is still necessary. Dietary Sources for Antioxidants and Vitamins Vitamin C: citrus fruits, tomatoes, bell peppers, broccoli.