Health: Hold The Oat Bran

Well-intentioned as it may be, the A.H.A. is stepping into a quagmire by trying to serve as a dietary oracle. Too often scientific ground shifts, and today's notion of sound nutritional advice becomes tomorrow's myth. The latest case in point: oat bran. Two years ago, the high-fiber grain was elevated to alimentary sainthood after a few studies showed that people who ate a diet rich in the stuff enjoyed a significant drop in their cholesterol levels. Doctors began recommending the grain to patients, and food manufacturers rushed to add it to everything from muffins to tortilla chips.

Last week the halo...

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