Type 2 diabetes affects how your body uses sugar (glucose) for energy.The best way to detect diabetes early is to get regular check-ups and blood tests with a healthcare provider.Factors that contribute to developing type 2 diabetes include being overweight, not getting enough exercise, and genetics.Early diagnosis is important to prevent the worst effects of type 2 diabetes.As a result, the disease may be diagnosed several years after onset, after complications have already arisen.More than 95% of people with diabetes have type 2 diabetes.Symptoms of type 2 diabetes can be mild.