Diabetes is a chronic health condition that affects the way the body makes energy from food. Normally, the human body produces a hormone called insulin that helps turn sugar from food into energy that the body can use or store. In people with diabetes, their bodies either don't produce enough insulin or don't use insulin properly. This can cause sugar levels in the blood to rise too high, which if left untreated can cause serious health problems over time—including heart disease, kidney disease and blindness. November is National Diabetes Month , an opportunity to learn more about this