Ramadan fasting means no food or drink from dawn to sunset, and it is a central religious obligation for healthy adult Muslims. However, Islam allows exemptions for people whose health would be harmed by fasting, including some people with diabetes. Islamic jurists explain that if fasting may harm a sick person, they may break the fast and make up later or offer fidyah (feeding a poor person) instead.
Even so, many Muslims with diabetes still desire to fast. Clinicians and diabetes organisations agree that some people with diabetes can fast safely, but only with careful planning, monitoring, and medical guidance.
Consultation and Pre-Ramadan Planning
Before Ramadan begins, people with diabetes should visit a healthcare provider. A pre-Ramadan medical assessment reviews overall health, blood sugar control, medications, and complications. This allows the doctor to classify risk and individualise plans. Patients who are at high risk (e.g., frequent low sugars, kidney issues) may be advised not to fast or to plan partial fasting under supervision.
A structured education session reduces complications. Research shows patients who received education about Ramadan saw fewer episodes of dangerously low sugar compared with those who did not prepare.
Read More: The Science of Ramadan Fasting: What 30 Days Does to Your Body
Monitoring Blood Sugar Does Not Break the Fast
One common worry is whether testing glucose during fasting breaks the fast. Medical and Islamic authorities agree that checking blood sugar does not invalidate the fast, because it does not involve eating or drinking. Regular monitoring helps detect dangerously high or low levels early and keeps fasting safer.
Doctors often recommend checking glucose multiple times: before suhoor, midday, before iftar, and after iftar, and whenever unwell. Clear targets such as keeping glucose above 70 mg/dL are used, and levels below or above safety thresholds mean the fast should be broken immediately.
Medication and Diet Adjustments
Medication timing and doses often need adjustment. People on insulin or certain tablets are at increased risk of low blood sugar during the day. Healthcare providers may recommend changing when insulin is given, especially rapid-acting types which are usually taken at iftar and suhoor. Oral diabetic medicines may need dose reduction or switching.
At suhoor, eating slow-release carbohydrates, protein, and plenty of water helps sustain energy and reduces glucose swings. At iftar, breaking the fast with balanced food and avoiding high-sugar heavy meals prevents a sharp post-fast rise in glucose.
Read More: The Resilience of Ramadan: How Faith Survives Conflict and Loss
When to Break the Fast
Most health guidance emphasises that if blood sugar falls below 70 mg/dL or rises above 300 mg/dL, the fast must be broken immediately and treatment started. Symptoms like dizziness, shaking, confusion, or weakness are warning signs of hypoglycemia or hyperglycemia that need urgent action.
The Bottom Line
Many people with diabetes can participate in Ramadan fasting safely if they plan ahead with their healthcare team, monitor glucose often, adjust medications appropriately, and listen to their body. Islamic rulings support exemptions for those who would be harmed, and glucose testing does not break the fast.
