Nutritional advice is rampant. Nutritional books, nutritional articles, specialty magazines, health food stores, and weight reduction institutes all give advice. Proposed national dietary guidelines have been published and more are likely to follow. Some respite from the flood may occur following a lawsuit against the estate of Adele Davis and her publishers following the death of an infant who was treated by his parents according to information they gleaned from one of Adele Davis' books.
Many reasons have been given for the proliferation of "nutritional experts." Hard data, easily verifiable, are hard to obtain. The minimal needs for vitamins and minerals can be verified in animals and confirmed by elimination of disease symptoms.