Pre-diabetes is a medical condition where blood glucose levels are higher than normal but not high enough to be called diabetes
Studies have shown that the onset of type 2 diabetes can be delayed or prevented by:
losing weight, and
increasing physical activity
Note:
People with pre-diabetes have high blood glucose levels higher than normal, but not yet high enough to be diagnosed with diabetes.
People with pre-diabetes can prevent or delay the onset of type 2 diabetes through lifestyle change and/or medication - though no medications are approved for diabetes prevention.
Reference
National Institute of Diabetes and Digestive and Kidney Diseases. National Diabetes Statistics, 2007. Bethesda, MD: U.S. Department of Health and Human Services, National Institutes of Health, 2008.