When does a diabetic patient fast, and is there a difference in fasting for a type 1 and type 2 diabetic patient? Hamad Medical Corporation in Qatar says that it is not recommended for a patient with type 1 diabetes to fast. Fasting entails multiple risks for diabetics - of both types - who have not managed their blood glucose levels well.
The biggest potential diabetes complications that fasting may cause are: Excessive low blood sugar (hypoglycemia) Excessive high blood sugar, which may lead to diabetic ketoacidosis (diabetic coma)