Nutrition: Vitamin Crackdown

For two generations, multiple-vitamin preparations of one form or another have been a familiar fixture on many an American breakfast table. Whether or not they are prescribed by a pediatrician, they almost always boast the kind of label that assures a cautious parent he is doing right by his child. The fine print spells out "Minimum Daily Requirements" in esoteric quantities such as milligrams, U.S.P. or international units, and the average uncertain layman usually decides that if a little is good, more is surely better. The business in vitamin and mineral supplements...

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