What Ramadan Means for the Body
Ramadan follows the Islamic lunar calendar, beginning a little earlier each year. From sunrise to sunset, nothing may enter the stomach — no food, no water, not even small sips. Before sunrise, Muslims eat a light meal (suhoor/sahur), while after sunset, families share a larger meal known as iftar.
For healthy adults, this routine can be manageable, but after weight loss surgery, fasting requires special consideration.
Who Is Exempt From Fasting
Islamic rules are clear: fasting is only required for those who are physically and mentally able. The following groups are exempt:
- Menstruating, pregnant, or breastfeeding women
- People with chronic illnesses
- Elderly individuals
- Children who have not yet reached puberty
What Changes After Weight Loss Surgery
Obesity is a chronic disease, and surgery is currently the only effective long-term treatment. Most weight loss occurs over 12–18 months, a period when the body is adapting to new eating habits. During this time, fasting is not recommended because it increases the risk of nutrient deficiencies and medical complications.
After surgery, patients must learn to:
- Eat small, frequent meals
- Drink enough fluids throughout the day
- Recognise signs of low blood sugar, which is especially important after a gastric bypass
Fasting disrupts these required habits and can place unnecessary stress on the body.
Why Fasting Can Be Risky After Surgery
Avoiding food and water during the day often leads to overeating in the evening. After major surgery, this can trigger:
- Dumping syndrome
- Nausea and vomiting
- Dehydration
- In rare cases, stomach injury due to eating too quickly or too much
Additionally, the absorption of essential post-bariatric vitamins may be impaired, increasing the risk of deficiencies.
Always Speak With Your Medical Team First
If you wish to fast after gastric sleeve or gastric bypass surgery, discuss it with your doctor and dietitian in advance. They can assess your individual situation, ensure your nutritional needs are met, and help you plan safely.
Your health comes first — and with the right medical guidance, you can make the best decision for your body during Ramadan.
