Diabetes is a disease where the body does not properly produce or use insulin. There are three main types of diabetes: type 1, type 2, and gestational diabetes. Type 1 diabetes is usually diagnosed in children and requires daily insulin injections, type 2 diabetes is the most common type and involves the body not properly using insulin, and gestational diabetes occurs in pregnant women. Complications of diabetes include heart disease, kidney disease, eye problems, nerve damage, and foot complications. Treatments include managing diet, exercise, weight loss, and insulin. Many famous people have been diagnosed with different types of diabetes.