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Chrysalis Clinic Health
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Patient Experience
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post surgical diets

Your new diet will need to be quite radically different from your usual diet. The surgical procedure is considered to create malnutrition, and life-long follow-up and regular monitoring of your nutritional status is essential in order to prevent you from, ultimately, suffering from the effects of this malnutrition.

Day 1 Post-op
Nothing by mouth.

2-4 days Post-op
You will progress through the following foods. The rate at which you add new foods to your diet will depend upon how quickly you recover from your surgery.

  • Clear fluid, low sugar diet: sugar-free jelly, diluted pure fruit juices, clear soups.
  • Full fluid, low sugar, low fat diet: all the above foods, as well as pureed vegetable soups, strained porridge, sugar-free custard.
  • Pureed diet: all foods must be pureed, and should not contain any added sugar. Fat content of the diet remains low.

4 days to 4 weeks Post-op
Pureed or soft high protein foods.

2 months Post-op
Foods should still be soft and easy to chew, but need no longer be pureed.

3 months onwards
Try introducing rice, soft bread (if you haven’t had this already) and a greater variety of vegetables and fruit.
Introduce one new food at a time.
You may not be able to tolerate certain foods. Leave these out of your diet for a few weeks, but try to introduce them again in the future.

Your diet should always be high in protein and low in refined carbohydrates and fats.

  • Eat small amounts: initially not more that 2 Tablespoons of food at a time. Your stomach pouch will eventually expand to hold about ½ to 1 cup of food or fluid. However, it will take many weeks before this happens.
  • Eat slowly and chew your food well, taking about 20-30 minutes to eat each meal.
  • Stop eating when you feel full. If you eat too much, or eat too fast, you will vomit.
  • Drink sufficient fluid to prevent dehydration and constipation (6 – 8 cups daily). Have small sips at a time, and do not drink with meals.
  • Frequent small meals are important. You should eat 3 small meals and 1 high protein snack per day.
  • A high protein diet is essential in order to maintain your nutritional status. You must include a source of protein at each meal.
  • You should eat protein first, then fruits and vegetables, and lastly whole grains.
  • Limit your intake of fats: they cause nausea, and will slow your weight loss.
  • Make sure your diet is healthy and balanced. Do not eat foods providing empty calories.
  • Avoid swallowing chunks of meat or other food that could block the pouch opening. For further information, see Frequently Asked Questions.
  • Daily and life-long vitamin supplementation is vital.