One website says frozen fruit in a smoothie is good for a diabetic, others say its not, who to believe which website will tell me what to eat or not?

Diabetic association: Fruit smoothies can be either good or bad for diabetics depending on the fruits and additives such as sugars. A good source for facts and dietary advice is the American Diabetes Association at diabetes.org.

Be mindful: While fruits are great and smoothies can likewise be great, remember as a diabetic you have impaired glucose handling. So with a fruit smoothy, your blood sugar may spike significant related to the fruit sugars. Same reason why diabetics drink orange juice when they are hypoglycemic(low blood sugar). You may first want to see how your blood sugar responds to a fruit smoothy.