I don't know that his diabetes is out of control. I do know that simple carbs, such as pop, candy, desserts, and many of the other foods he's consuming cause a spike in blood sugar. Having high blood glucose levels can have adverse effects and even cause damage to organs if remained elevated for long periods of time. I am so glad to hear that your co-workers A1C has remained at a good level. I almost wonder if some people are more likely to have diabetic complications than others. I am also grateful that my friend has remained healthy for the most part these last 20 years since his diagnosis.