The short explanation
Some people with diabetes on insulin do fast during Ramzan, but it carries real risks and should be planned carefully with your doctor well before the month starts. Long daytime fasts can cause low sugar, especially with insulin, and heavy meals at suhoor and iftar can push sugar very high. Dehydration is also a risk in hot weather. Your doctor will consider your type of diabetes, how well controlled it is, any past episodes of low sugar, kidney function and other health conditions. They may change the type, amount or timing of insulin, advise checking sugar more often, and explain when you must break the fast. Many religious scholars agree that people for whom fasting is harmful can be exempted or can make up fasts later.
What depends on your situation
The parts of this that change from woman to woman. Uncertainty is stated, not hidden.
- Checking sugar does not break the fast, according to most religious guidance.
- Eating slowly digested foods at suhoor and avoiding very sweet and fried foods at iftar helps.
- Drinking enough water between iftar and suhoor is important.
What this answer cannot determine
The boundary of online education. These need a clinician who can see you.
- This cannot tell you whether fasting is safe for you or how to adjust your insulin. Your doctor needs to plan this with you.
Questions for your clinician
Take these with you. You can add any of them to an appointment card.
- Is it safe for me to fast this year?
- How should my insulin be changed during Ramzan?
- How often should I check my sugar while fasting?
- When should I break the fast?
When to seek help
Clinician-approved guidance for this topic. When in doubt, being seen is never the wrong choice.
Emergency — call 112 now
- Call 112 if you become confused, unconscious, have a seizure or persistent vomiting while fasting.
Get help the same day
- Break the fast and contact your doctor the same day if sugar goes very low or very high, or you feel unwell.
Raise it at a routine appointment
- Book a routine appointment a few weeks before Ramzan to make a plan.
Sources
The evidence this explanation is built on.
- Diabetes MedlinePlus (US National Library of Medicine)
- Preventing diabetes problems National Institute of Diabetes and Digestive and Kidney Diseases (NIH)
- Diabetes World Health Organization
Who wrote and reviewed this
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- Author
- AskHer Editorial (AI-assisted draft) AskHer's editorial team — not an individual clinician Works in English, தமிழ், हिन्दी
- Clinical reviewer
- Nobody yet No clinician has signed this answer off, and no person on the editorial team has read it yet. That is what the “Written with AI assistance” label means. It is queued for an editor to read, and then for a clinician who works in this area. The sources it was drafted against are listed above.
- Review status
- Written with AI assistance — not yet reviewed by a person
- Last reviewed
- Not yet reviewed by a person
- Version
- 1
Correction history
Substantive changes are listed, not quietly edited away.
No corrections have been made since this answer was first published.
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