Vitamin C: RDA at least 60 mg. (1/2 cup orange juice = 70 mg.) Citrus fruits and juices and tomatoes are good sources of vitamin C. Eat whole fruit for extra fiber. Avoid juice in glass containers, and heat-pasteurized juice. Light and heat destroy some of the vitamin C.
Vitamin E: RDA 8 mg for women / 10 mg. for men (1 tablespoon of canola oil = 9 mg.) Good sources include nuts, seeds and their oils, fatty fish such as salmon, mackerel, halibut, and trout, and wheat germ. Use canola, olive, or another vegetable oil in place of butter or margarine when cooking.
Beta-carotene: no established RDA. Expert Dr. Kleiner, however, recommends 5-6 mg. ( One carrot = 12 mg.) Orange and yellow vegetables, and leafy green vegetables, including broccoli, are all good sources. Instead of potato chips or popcorn for an evening snack while watching television, opt for prepackaged, washed and peeled baby carrots.
If you feel you are unable to meet the RDAs through diet alone, by all means take an all-in-one antioxidant vitamin supplement a day, but continue to pay attention to rich food sources.