It's common knowledge that packaged snacks and baked goods are loaded with sugar, sodium, junky white flour and preservatives. Their dangerous combo of sugar and refined flour spikes blood sugar and promotes inflammation, which interferes with insulin's ability to function properly. If that isn't enough to turn you away from the vending machine, you should know that these highly-processed sweet treats often contain trans fats. These toxic fats raise your cholesterol and risk of heart disease, and are by far the most dangerous of fat types for diabetics. Check labels carefully; always choose packaged products that list 0 grams trans fat and do not include any partially hydrogenated oils (a major source of trans fats) on the ingredients panel. By ditching these packaged desserts, you'll save calories and cash and get a better handle on your blood sugar control.