Medicine: Turn Down the Appestat

Why do people overeat and get fat? Why, after reducing, do so many of them quickly regain the weight they have lost? In both cases, says Dr. Norman Jolliffe in Reduce and Stay Reduced, published last week (Simon & Schuster; $2.95), the answer lies in the individual's appetite-regulating mechanism—or, as he calls it, the "appestat." People get so used to overeating that they cannot feel satisfied with the right amount of food.

Long the top nutritionist in New York City's Health Department, Dr. Jolliffe believes that people may overeat for one of three main reasons: 1) simple habit,which may be the result...

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