Dr.Jeff
Here's a good analysis of 28 studies that demonstrate structured lifestyle changes (diet, exercise) help to prevent diabetes -
http://www.sciencedaily.com/releases/2012/01/120110140229.htm
It's nice to see publication of an article that shows how simple changes can prevent a disease that currently affects 26 million Americans and places a dramatic financial burden on our society. The use of drugs was never considered.
Another factor to understand is the role of fungal candida albicans and antibiotics in creating diabetes. More to come.