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Fasting is an important spiritual aspect of many religions but it can lead to major health problems for some people with diabetes. If you are unwell or have any symptoms of illness such as a cold, Covid-19 or flu, it’s best not to fast. The Islamic month of Ramadan is one of the longest periods of fasting. They have specific advice on fasting and diabetes and fasting during Ramadan.
To find out more about the risk of fasting with diabetes please visit: Diabetes UK
Page last reviewed: 04 November 2025 Page created: 04 November 2025