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Dr. Jacqueline Gerhart: If you have prediabetes, what are the chances you get full-blown diabetes?

Dear Dr. Gerhart: I was just told I have prediabetes. What are the chances I?m going to get full-blown diabetes?Dear Reader: I?m sorry to hear you have prediabetes, also known as impaired fasting glucose or impaired glucose tolerance. It is diagnosed in patients with elevated blood sugars that are not yet high enough to be considered diabetes.