For those who have been diagnosed as pre-diabetic, or diagnosed with type 2 Diabetes, or are in the incipient asymptomatic stages of those conditions; the following YouTube clips explain very well the role that Insulin plays in moderating the body's response to changes in blood sugar levels. Understanding this may make sense of dietary and exercise strategies for mediating blood sugar with or without specific medications. Consult your health practitioner before altering significantly your present dietary and exercise regimes if you have a pre existing diabetic condition. What is Insulin Resistance