Caused primarily by genetic makeup, a sedentary lifestyle and poor eating habits, type 2 diabetes can be reversed in some cases. By making changes to their lives such as adding exercise and improving their diets, many type 2 diabetics can drop their glucose or sugar numbers back to the normal range, reversing their condition. "We know that excess body weight adversely affects every organ system in the body," says Gary Foster, director of Temple's Center for Obesity Research and Education. "So it shouldn't be surprising that as obesity increases, as it has over the past 30 years, that medical conditions, especially conditions like type 2 diabetes, will also increase."