The document discusses the metabolic effects of sleeve gastrectomy for treating obesity and diabetes. It finds that sleeve gastrectomy results in significant weight loss and resolution of diabetes in patients with BMI over 35. For patients with BMI between 30-35, sleeve gastrectomy also led to improved blood glucose levels, reduced medication use, and 70% resolution of diabetes after 1 year according to HbA1c levels. However, more randomized trials are still needed to determine if these effects are long-lasting for chronic diseases like diabetes.