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Abstract
Have you looked at the back of a cereal box or at a book on nutrition, trying to figure out what value a food holds for you? When you see that a given plant has 18 mg niacin per 100 g (3½ oz.), do you know that one 100-g serving of that vegetable sàtisfies your RDA (recommended dietary allowance) established by the NAS (National Academy of Sciences)? Have you read a lot of articles talking about foods low in one nutrient, high in another, yet not known what they meant by high or low?