Postoperative diet

Postoperative diet

For the stomach to heal completely after the surgery it is necessary to strictly follow the dietary instructions. If solid food is consumed too soon after the procedure, the stomach might get expanded which may worsenthe effect of the surgery and, in extreme cases, cause the sutured lines to break. Even after a few weeks food will have to be thoroughly chewed. Some types of food, especially dry and hard pieces of meat, may cause discomfort or pain, sense of tightness and congestion in the epigastrium. By eating slowly and calmly you will learn when the stomach is full and avoid the above unpleasant sensations. After the surgery 1/4 to 1/3 of the calories consumed before is usually sufficient. Too lavish meals may cause vomiting. It usually takes from a few to a dozen or so weeks to learn how to prepare and consume the meals properly. Thanks to the surgery, despite a small amount of the consumed food, you will be satiated and will not feel hunger. The aromatic and visual stimuli, not the stomach itself may be responsible for the increased appetite.
The type of liquids drank after the surgery is also significant. Such beverages as beer, coca-cola and other sweet drinks and milk high in fat may ruin the effects of the surgery. We also advise against fizzy drinks and drinking through a straw in the early postoperative period, as they may cause discomfort and feeling of flatulence. The healthy beverages include still water and green tea. The success of the surgery is in your hands.

8 goledenrules

  1. Follow the dietary instructions, especially during the postoperative period.
  2. Drink plenty of water.
  3. Do breaks between eating and drinking.
  4. Eat meals regularly during the day.
  5. Choose balanced meals high in proteins.
  6. Chew each bite thoroughly.
  7. Enrichyour diet gradually.
  8. If you feel full, stop eating even if there is only one bite left.
  9. Enjoy rediscoveringthe new taste of natural, the least processed food, not spoilt by frying, excessive seasoning or heavy sauces.


Time after the surgery Instructions Examples of products/meals
1 and 2 day
  • Drinking only neutralliquids
  • Drinking only water in the amount of 50ml every half hour
  • The daily consumption should amount to approximately 1500ml
  • Drinking through a straw should be avoided
  • Water
From the 3 day to about a week
  • Volume of consumed neutral liquids increased to 1900 – 2000ml
  • Slowdrinkingrecommended
  • Noutritiondrinksintroducedgradually
  • Introduction of vitamin and mineral supplementation
  • Water
  • Low-fat milk
  • Natural youghurt
  • Vegetable broth
2 and 3 week
  • Continued drinking of neutral liquids in the amount of up to 2000mla day
  • Gradual substitution of liquids with minced food
  • Necessity to consume products rich in low-fat proteins
  • Introduction of about 5 meals a day at regular intervals
  • The meals should not exceed the volume of 150 ml. Continued vitamin and mineral supplementation.
  • Water
  • Low-fat milk, natural yoghurts, buttermilk
  • Boiled and minced/blended products such as fish, eggs, poultry
  • Ready-made meals for babies
From 4thto 6thweek
      • Continued drinking of neutral liquids in the amount of up to 2000 ml a day
      • Continued eating of about 5 meals a day at regular intervals
      • Gradual enriching the diet with boiled vegetables, peeled fruit.
      • Gradual introduction of solid meals, cooked in water or steamed.
      • Continued vitamin and mineral supplementation
  • Water
  • Low-fat cottage cheese
  • Boiled or baked fish
  • Boiled skinless poultry
  • Water-boiled or steamed vegetables such as broccoli, cauliflower, carrot
  • Raw, peeledfruit
  • Brown rice, groats in a limited amount
After 6thweek
  • Continued drinking of neutral liquids in the amount of up to 2000 ml a day
  • Continued vitamin and mineral supplementation.
  • Continued eating of about 5 meals a day at regular intervals
  • Consumption of well-balanced meals in terms of caloric value
  • Avoiding high-fat products
  • Avoiding fried food
  • Water
  • Low-fat cottage cheese,
  • Boiled or baked fish
  • Boiled skinless poultry
  • Water-boiled or steamed vegetables such as broccoli, cauliflower, carrot
  • Raw, peeledfruit
  • Brown rice
  • Groat
  • Bread
  • Pudding, pretzels

Vitamins and minerals
It is necessary to supplement vitamins and minerals after the surgery. During the first month liquid vitamins (e.g. Biovital 2x10 ml) are recommended, then in pills (e.g. Centrum 1 pill a day).
The elements that are deficient most frequently include:
- iron
- calcium
- vitamin B1
- vitaminB6
- vitaminB12
- vitaminD3
- folic acid
- magnesium
Regular follow-up appointments will allow an early diagnosis and treatment of the vitamins and minerals deficiency and, as a result, will help to avoid its consequences.
After the gastric bypass it is necessary to take vitamins and minerals permanently (for the rest of the patient’s life). After the sleeve gastrectomy it is most crucial during the first years after the surgery.


  • Łarysa P.

    Hello everyone, I would like to sincerely thank you for a chance of a new, better life. I have never met such polite and understanding doctor as Piotr Myśliwiec, who also spares no time for his patients. He would always comprehensively explain the aspects which I did not understand. Thanks to the procedure which he…

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  • Grażyna L.

    On 4th May 2016 doctor Piotr Myśliwiec gave me a new, better life. During the first visit he has already showed his big heart for patients. He explained to me the stages of the procedure, the possible effects but also potential problems. He was talking to me and dispelling all my doubts with a smile…

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  • Robert C.

    This September I have undergone a gastric bypasssurgery performed by doctor Piotr Myśliwiec. For a few weeks hehas been patiently and calmly explaining to me the course of the procedure. After the surgery he visited me a few times to monitor my recovery. I was released home the next day. After 2 months I have…

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  • Anonymous

    Before the surgery I weighed 105 kg though I was only 158 cm tall. The obesity I suffered from deprived me of my confidence. I abandoned active life, a lot of everyday activities caused great difficulty to me. The problem with finding clothes in the right size also contributed to my low self-esteem and deteriorating…

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  • Anonymous

    Within 10 months after the gastric bypass I have lost over 50 kg (from 140 kg to 85 kg)!!! Doctor Piotr Myśliwiec a real wonderworker, the impossible became possible! The doctorhas not only a deep knowledge and expertise, but also kind and matter-of-fact attitude towards patients. I am grateful tothe doctorfor the “second youth”. The…

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  • Anonymous

    Piotr Myśliwiec, M.D., Ph.D, has completely changed my life:) He is friendly, warm and always smiling – which is really rare in doctors – but, most importantly, he is a very good surgeon. The sleeve gastrectomysurgery which I underwent 1.5 year agodid not involve any complications or postoperative pain but, what is the most significant…

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  • Piotr
    Piotr, 30 age

    My problems with obesity started when I was 2 years old and suffered a serious body dehydration. From that moment on I began to gain weight. My picked on me for many years which was particularly nasty, especially during the school years. As a 7-year-old I weighed over 60 kilograms… I started to suffer from…

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