A patient is diagnosed as having prediabetes when glucose (blood sugar) is higher than normal but not high enough to be diagnosed as diabetes. At least 43 million Americans have this condition, according to estimates by the government. Prediabetes is almost always present in an individual before type 2 diabetes develops.

Screening for prediabetes is an effective strategy for identifying individuals who are at risk for developing type 2 diabetes. By identifying the individuals with prediabetes, physicians can intervene sooner with a plan of treatment. Changes in lifestyle, such as diet, weight loss and exercise, are usually included in the treatment. These interventions have been successful in delaying or preventing type 2 diabetes.

Detection and treatment of prediabetes also may reduce the risk of heart disease, stroke and other complications. The damage that occurs to organs and body systems from type 2 diabetes, such as diabetic neuropathy and diabetic retinopathy, can actually start during prediabetes. Treatment of prediabetes promotes a healthier lifestyle, which in turn can prevent type 2 diabetes and medical complications.