Review Article introduCtionRamadan fasting (RF) observed by adult Muslims entails abstinence from food, water, all oral substances, intravenous fluid therapy, and smoking between dawn and sunset during the 9 th month of the Muslims' lunar calendar. [1] Ramadan's impact on health and disease stems from the biological effects of prolonged fasting during the daytime and possible overfeeding at night and its various social changes. The last three decades witnessed a rising interest in the research on RF in health and disease. [2] Diabetes has been the most extensively studied single medical condition in connection with RF. [3] Despite the increase in volume of the literature, concern has been voiced regarding the quality of publications on the subject. [4,5] The literature on health aspects of Ramadan fasting (RF) is widely spread in many journals, making it not readily accessible to those interested in the subject. We therefore aimed to provide a thematic overview of the global research work conducted in the realm of RF during 2020 on the impact of RF in people with diabetes. We aimed to provide a concise bird's eye view of the literature published in a year and to identify the basis of evidence that may guide clinical practices for the years to come.
matErials and mEthodsThis is a narrative, nonsystematic review of the literature retrieved from one online database over a full calendar year (2020). The PubMed search engine of the National Center for Biotechnology Information at the U.S. National Library of Medicine was used. The search term ("Ramadan Fasting" OR "Fast of Ramadan") AND diabetes, with time filters from January 1, 2020, to December 31, 2020, was used to identify the relevant records. Retrieved articles were examined forThe literature on health aspects of Ramadan fasting (RF) is widely spread in many journals, making it not readily accessible to those interested in the subject. We aimed to provide a narrative overview of the global literature production in 1 year (2020) on diabetes and RF. This was a narrative, nonsystematic review of the international literature from a single major medical online database (i.e., PubMed) during the year 2020. The search term "Ramadan fasting AND Diabetes" was used, and the relevant literature was narrated in a concise thematic account. The publications spanned a vast array of topics related to RF, including assessments of safety and efficacy profiles of older and newer diabetes therapies, modes of insulin delivery, evaluating the role of utilizing advanced technology for the treatment, and monitoring of blood glucose during RF. Increased interest was evident in capturing patients' perspectives and healthcare professionals' perceptions, attitudes, and practices during Ramadan. Fasting by high-risk groups was studied. Not surprisingly, some reports covered COVID-19 and Ramadan and the role of telemedicine in ramadan. The current literature review presents this year's research data on the safety of fasting practices, care models, and patients' experiences and perspectives....