Fasting and Religious Observance

Fasting is part of family and religious life for many people, and Type 1 makes it genuinely riskier than most guidance for diabetes conveys.

There are two dangers, pulling in opposite directions. Continuing insulin without eating causes low blood sugar — fasting while taking glucose-lowering medicine is a recognised cause. And reducing or skipping insulin to compensate risks ketones and ketoacidosis, which in Type 1 can develop within hours.

That combination is why extended fasting in Type 1 is a medical decision rather than a personal one, and why it needs planning with your doctor well before the day, not on the morning itself.

If fasting is agreed, expect it to involve changed doses rather than skipped ones, considerably more frequent checking, and clear thresholds for breaking the fast. Know those numbers in advance.

Break the fast if you go low, if you have ketones, or if you feel unwell. Every tradition that includes fasting also makes allowance for illness, and this is illness.

For children with Type 1, extended fasting is generally not advised at all, and a religious leader will usually confirm that children are exempt.