Stomach contractions are generally unmistakable hunger signals to the stomach's owner. They are, that is, if the owner is a healthy man or woman in the normal weight range. Nature's built-in control mechanisms, reinforced by habit, are so strong that most people feel hungry three or four times a day, and when they do, they automatically eat the necessary amount of food. The trouble with most overweight men and women, say two Philadelphia researchers, is that their signaling system has somehow broken down. They feel hunger pangs, but they fail to get the message to take in food. As...
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