Non-insulin-dependent diabetes is another name for adult-onset diabetes (type 2). This type of diabetes is characterized by insulin resistance and a relative deficiency of insulin secretion. Unlike type 1 diabetes, which requires insulin, type 2 diabetes in the early stages can be managed with lifestyle changes and oral glucose-lowering medications. However, over time, many patients develop insulin deficiency, requiring insulin therapy. Type 2 diabetes is the most common form of diabetes. It is more common in people over 40 who are overweight. Treatment is aimed at maintaining normal blood sugar levels through diet, exercise and, if necessary, medications.