Fasting with Diabetes: Intermittent and Religious Fasts
What to know before an intermittent or religious fast, how it affects blood sugar and how to plan with care.
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About this course
What to know before an intermittent or religious fast, how it affects blood sugar and how to plan with care.
Many people fast for health, faith or tradition, and diabetes means a fast needs some planning. This course explains how fasting changes blood sugar, covers intermittent fasting and religious fasts like Ramadan, and shows how to spot and treat a low while fasting.
You will also learn how to break a fast gently and how to plan each fast with your doctor before it starts.
What you will learn
Medically reviewed by
Dr. Rezwana Parvin Rumpa is an obstetrics and gynaecology specialist with clinical focus on gestational diabetes, PCOS, and fertility. She holds the MRCOG (Final Part) from the Royal College of Obstetricians and Gynaecologists in London, the MRCPI (Final Part) from the Royal College of Physicians of Ireland, and an MBBS from Shaheed Monsur Ali Medical College under Dhaka University. Dr. Rumpa serves as a Senior Medical Officer in the Obs and Gynae department at BRB Hospitals Ltd, where she has spent three years managing prenatal care, emergency obstetric cases, and women's-health surgery. On Diabic, she medically reviews content for women living with diabetes, with particular attention to pregnancy, PCOS, and reproductive-health intersections.
For learning only. Talk to your doctor before changing medicine or habits.
Chapter 1: What to Know Before You Fast
- WHOGlobal report on diabetes (opens in a new tab)
- American Diabetes AssociationStandards of Care 2025, PubMed article 39651983 (opens in a new tab)
- Mayo ClinicIntermittent fasting: What are the benefits? (opens in a new tab)
- American Diabetes AssociationHyperglycemia (High Blood Glucose) (opens in a new tab)
Chapter 2: How Fasting Changes Blood Sugar
Chapter 3: Intermittent Fasting
Chapter 4: Ramadan and Other Religious Fasts
Chapter 5: Lows While Fasting
Chapter 6: Breaking a Fast
Chapter 7: Planning a Fast with Your Doctor
Further reading on Diabic
- Fasting and Diabetes: What You Need to Know
- Is Intermittent Fasting Safe for Type 2 Diabetes
- Fasting with Type 2 Diabetes: Is It Safe?
- 16/8 Intermittent Fasting with Type 2 Diabetes
- Sick Day Checklist for Diabetes: Stay on Track
- Fasting vs Postprandial Glucose: What's the Difference
- What Your Fasting Blood Sugar Number Actually Means
- Blood Sugar After Food: What's Normal
- Napping and Blood Sugar: What the Research Actually Says
- Why Does Diabetes Make You Tired? What Helps
- Can Fasting Reverse Diabetes? What Research Says
- Can Diabetes Be Reversed by Diet and Exercise?
- Blood Sugar Management During Long Meetings
- Managing Diabetes at Work: Practical Strategies
- Low Glycemic Diet and Diabetes: What to Eat
- Low Blood Sugar Symptoms That Hit Without Warning
- Hypoglycemia Emergency Treatment: Act Fast to Stay Safe
- Glucose Tablets for Hypoglycemia: When and How to Use Them
- Using a Continuous Glucose Monitor for Hypoglycemia
- Best Order to Eat Food for Blood Sugar
- 7 Ways to Prevent Blood Sugar Spikes After Meals