Diabetes Make an Appointment Find a Doctor Ask a Question Reviewed by Dthia Kalkwarf (January 01, 2014) Diabetes is a disease in which the pancreas is unable to make insulin or the body is unable to use insulin or both. This leads to high blood sugar levels in the blood. Blood sugar is another way to say blood glucose. Your body needs blood glucose for energy to be able to do work, including walking, breathing, and even thinking. View Diabetes Blood Glucose Log Sheet Programs & Services Diabetes Program Clinical Trials For more than 100 years, National Jewish Health has been committed to finding new treatments and cures for diseases. Search our clinical trials.