Diabetes includes two diseases: Type 1, in which the body does not produce insulin, and Type 2, in which the body can no longer use the insulin it produces. Each one follows different courses of progression and requires different types of treatments. The occurrence of Type 2 diabetes—linked to diet, obesity, and inactivity—is on the rise. More than 30 million American children and adults suffer from diabetes, and approximately 1.5 million new cases are diagnosed each year in the United States, according to the American Diabetes Association. As doctors and researchers learn more about the...