1. Background on fasting and Type 1 Diabetes

Fasting during Ramadan is an integral part of Islam. While the call to fast is important, individuals with Type 1 Diabetes must carefully consider their health and safety.

Unlike people without diabetes, those with T1D rely completely on insulin to regulate blood sugar levels. Fasting can significantly disrupt this delicate balance, potentially leading to serious complications. However, with structured education, individualized medical guidance, and careful preparation, it is possible for some people with T1D to fast safely.

It is important to note that the Quran provides clear guidance on exemptions for those with chronic diseases, including diabetes (Surah Al-Baqarah, Verses 184-185), emphasizing that individual health and well-being are the priorities.

2. What are the most common risks of fasting with Type 1 Diabetes

For people with T1D, controlling blood glucose during fasting is particularly challenging. When the body goes without food for extended periods, it begins to break down stored glucose and can produce harmful substances called ketones. This can lead to dangerous conditions such as Diabetic Ketoacidosis (DKA).

The most common risks include:

Hypoglycemia: Extended fasting periods with reduced food intake and insulin modifications can cause dangerously low blood glucose levels.

Hyperglycemia and Ketoacidosis: Insufficient insulin during fasting may trigger excessive breakdown of glycogen and create new glucose, potentially causing DKA

Dehydration: Reduced fluid intake between dawn and dusk increases dehydration risk, especially in warmer climates.

3. Risk Assessment and Guidelines

Fasting with T1D requires careful medical evaluation and personalized planning. A comprehensive pre-Ramadan medical assessment is crucial, typically conducted 1-2 months before Ramadan.

Doctors use a scoring system (the IDF-DAR score) to determine your safety level. Because Type 1 Diabetes is a complex condition, it automatically starts with 1 point. Additional points are added based on your health history:

What your total score means:

• 0 – 3 Points (Low Risk): Safer to fast.

• 3.5 – 6 Points (Moderate Risk): Fasting is not recommended. If you choose to fast, you need very close medical care.

• Over 6 Points (High Risk): You are strongly advised not to fast because the danger is too high.

4. Criteria for safe fasting

For those in the moderate-risk category, several key criteria must be met:

a. Glycemic Control: A comprehensive review of blood glucose profile is essential. Typically, an HbA1c below 9% is recommended.

b. Risk Awareness: Potential adverse effects must be acknowledged and preventative measures established.

c. Nutritional Planning:

• Comprehensive nutritional assessment

• Carbohydrate intake review

• Meal planning and carbohydrate counting techniques

d. Insulin Management:

• Total Daily Dose (TDD): Usually reduced to 70%–85% of the pre-fasting dose.

• Basal Insulin: For those on injections, a dose reduction of 30%–40% is recommended.

• Mealtime (Bolus) Insulin: Full dose for Iftar; reduction of 25%–50% for Suhoor.

e. Blood Glucose Monitoring: Frequent testing using Continuous Glucose Monitoring (CGM) or finger-pricks (4–7 times daily) to manage glucose levels.

f. Immediate fast-breaking: You must break the fast if:

• Blood glucose is below 3.9 mmol/L (70 mg/dL).

• Blood glucose is above 16.7 mmol/L (300 mg/dL).

Symptoms of illness, dehydration, or DKA occur.

5. Pre-Ramadan Education

Structured education is critical for safe fasting. Healthcare professionals should provide comprehensive sessions several weeks before Ramadan, covering:

• Blood glucose self-monitoring during fasting and non-fasting hours

• Complication recognition and management

• Adjustments to insulin regimens

• Meal planning, food choices and hydration

• When and how to break the fast if necessary​​

6. Conclusion

Fasting with Type 1 Diabetes requires a careful, personalized approach. By working closely with healthcare professionals, individuals can make informed decisions about their ability to fast safely while minimizing potential complications.

Remember: Your health and safety are the most important. The religious tradition allows exemptions for those who cannot fast safely, and prioritizing your well-being is a priority.