The association between sugar and Type 2 Diabetes is undeniable. The Glycemic Index (GI) was developed to prevent the onset of Type 2 Diabetes. It became a guide to consumers. The public can now be directed towards the right foods and beverages that do not cause Type 2 Diabetes. (http://www.glycemicindex.com/about.php)
When producing insulin, our bodies are reacting to the carbohydrates. The GI is a chart which provides a rating of how much insulin is produced. The greater the rating, the more insulin is produced when a food or beverage is consumed.
More than 29 million people are affected by diabetes in the US, and 415 million, worldwide (reference). Diabetes takes place when body cells no longer interact with the insulin, or when insulin is no longer effective. Both these circumstances may apply. The effects of this disease requires a lifestyle change.
A GI chart can be helpful, but it can also be misleading. For example, watermelon and carrots can have a higher GI rating than soda pop. Our common sense, however, tells us that fruits and vegetable are better for us than water with artificial color and flavor, as well as high fructose corn syrup. So, trust your instinct.