State of latent impairment of carbohydrate metabolism in which the criteria for diabetes mellitus are not all satisfied; sometimes controllable by diet alone; called also impaired glucose tolerance and impaired fasting glucose.

Prediabetes is a component of metabolic syndrome and is characterized by elevated blood sugar levels that fall below the threshold to diagnose diabetes mellitus. It usually does not cause symptoms but people with prediabetes often have obesity (especially abdominal or visceral obesity), dyslipidemia with high triglycerides and/or low HDL cholesterol, and hypertension...