Nutrition after obesity surgery is critically important for the success of the procedure and the patient’s recovery. Following the prescribed diet helps the digestive system adapt to its new state and reduces the risk of complications. Below is a day-by-day and weekly diet guide:
Day 1
On the first day after surgery, the patient is closely monitored in the hospital. Nutrition usually begins with clear liquids. Allowed options include:
- Water (sipped slowly and in small amounts)
- Diluted apple juice or 100% non-acidic fruit juices
Feeling: The stomach may still feel sensitive and bloated. Hunger is usually suppressed, but thirst may be prominent, making fluid intake crucial.
Day 2
The clear liquid diet continues on the second day to avoid irritating the stomach while maintaining hydration. Suitable options include:
- Diluted apple juice or 100% non-acidic fruit juices
- Protein drinks
- Water
Feeling: The stomach may still feel tender and bloated as it hasn’t yet returned to full function. Continue fluid intake and begin light walking.
Day 3
On day three, patients can start transitioning to a full liquid diet. Protein intake begins without overloading the stomach.
- Protein drinks
- Lactose-free milk or diluted yogurt
- Diluted apple juice or 100% non-acidic fruit juices
- Water
Feeling: The sense of hunger continues to decrease, and fullness is felt more quickly. Continue focusing on hydration and light activity.
Week 1
The first week continues with a liquid-based diet. The aim is to stay hydrated and gradually build calorie intake. Additional items can include:
- Non-gassy, fiber-free soups (excluding lentil, ezogelin, broccoli)
- Unsweetened compote juice
- Protein supplements
- Ayran, kefir, yogurt
- Unsweetened herbal teas
Feeling: The stomach starts to stabilize, but feelings of fullness or discomfort may still occur. Controlled fluid intake is key.
Week 2
During the second week, soft and pureed foods can be introduced, but solid foods are still avoided.
- Pureed, non-gassy vegetables (excluding broccoli, cauliflower)
- Unsweetened milk-based puddings
- Pureed boiled chicken or fish
- Boiled egg (in puree form)
Feeling: Hunger becomes more manageable, but the stomach remains sensitive. New foods should only be introduced with medical guidance.
Coffee, Tea, Alcohol, and Smoking
Due to stomach sensitivity, coffee and tea should be limited in the early weeks. Caffeine-free, unsweetened herbal teas are preferable. Regular coffee may be reintroduced after 4 weeks, only under a doctor’s recommendation. Alcohol harms the stomach lining and increases the risk of dumping syndrome. Smoking delays wound healing and raises infection risk. Both should be strictly avoided after surgery.
When Can I Return to a Normal Diet?
Solid foods are usually reintroduced within 4 weeks after obesity surgery, depending on individual recovery and the surgeon’s advice. Important considerations when returning to a normal diet:
- Chew food thoroughly
- Avoid fatty, spicy, acidic, and gassy foods
- Control portion sizes and listen to your body's signals
The transition to normal eating should be done in coordination with your doctor and dietitian. A personalized program designed with their guidance will significantly support your recovery and long-term success.
