No one knows exactly what causes type 2 diabetes. But we do know that certain behaviors and conditions, called risk factors, can make people more likely to develop it. Risk factors for type 2 diabetes include:
Having a family member with type 2 diabetes
Being overweight
Getting very little exercise
Being over 40 years old
Being Hispanic, Native American, African American, or Asian/Pacific Islander
Having had gestational diabetes (diabetes during pregnancy), or a baby weighing over 9 pounds