Background: Diabetes is one of the most challenging health problems in twenty-first century. The number of people with diabetes is increasing (366 million people in 2011) due to population growth, aging, urbanization, and increasing prevalence of obesity and physical inactivity. Prediabetes, (global prevalence of impaired glucose tolerance [IGT] 8.3%), typically defined as blood glucose concentration higher than normal, but lower than diabetes thresholds, is a high-risk state for diabetes development. The joint prevalence of diabetes and IGT in Saudi Arabia for people above 30 is 40%.