08 March 2019
Vol 363, Issue 6431

About The Cover

Cover image expansion

COVER When health experts declared that prediabetes, a slightly elevated blood sugar level, is a medical condition that calls for treatment, tens of millions of Americans became potential patients. But as a Science investigative report shows, the risks of prediabetes may have been greatly exaggerated, and many treatments offer little benefit. See page 1026.
Illustration: Stephan Schmitz