The more doctors learn about diabetes, the more they are inclined to revise old theories about it and the accepted methods of treatment. In recent weeks, research physicians have come closer to a complete turnabout in their thinking. They now believe that the commonest form of diabetes, far from representing a simple shortage of the hormone insulin, is a much more complex and still mystifying disorder. They have discovered a striking paradox: the great majority of adult patients have higher-than-average levels of insulin activity in their blood at the very time that...
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