Just a warning, just becuase it is no sugar added, doesn't mean it is good for a diabetic or anyone with sugar issues. Many of WDW no sugar added desserts are off limit to me due to extremly high carb count (I am diagnosed hypoglycemic/pre-diabetic). It will all depend on your Dad, and his particuliar situation. What is good for one is not good for all, and diabetics all react differently to sugars and or carbs. If you father has been diabetic for a while, he should be pretty well versed in how his body will react. Also like any other food subject, tastes vary.