Fasting the holy month of Ramadan is passionately practiced by all Muslim population around the world. Patients with diabetes are generally considered to have a higher risk of fasting. The current international guidelines have risk-stratified the patients with diabetes and other comorbidities to different categories, and the decision of fasting or not is made based on this categorization. Many studies looked at the impact of Ramadan fasting on those high-risk patients, and many are currently being in progress.