After gastric bypass surgery, you will have to learn a new way of eating and drinking. Your new stomach is much smaller than before; in addition, it has a small opening in its lower part, called a stoma (its bariatric surgeon could call it gastrojejunostomy). If you do not proceed with care, the stoma can become clogged with food. To protect your new stomach and get the results you want, you need to:

• Eat very small meals.
• Eat slowly.
• Eat softer foods.
• Chew food well.
• Do not eat food and drink at the same time.
• Take your vitamins and supplements regularly.

It is important that you stick to the meal plan that has been prepared for you. The operation was only the first step; which you succeed in losing weight will depend on the decisions you make after the operation.

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During the first 2 to 3 weeks after the operation you will have to consume a liquid diet; then he will eat only soft foods for 2 to 3 more weeks. Follow the instructions of your bariatric surgery team regarding the best liquids and soft foods. Once this period has elapsed, you can incorporate other foods into your diet, following the instructions of your bariatric surgery team and your nutritionist.


After the operation, your stomach can accommodate only 2 to 4 tablespoons of food or drinks; approximately one year later, it will have widened to contain more food or drinks. Given the small size of your stomach, you will need to eat and drink much less than before the operation, and you will have to plan your meals carefully. You need to eat healthy and nutritious meals. Work with a nutritionist to learn how to eat and what foods are best for you. Follow the meal plan given to you. Here are some general recommendations:

How much you should eat

1. Some suggestions about how much you should eat are the following:
2. You should consume 4 to 6 small meals a day.
3. You will have a planned diet and meal schedules for almost 2 months. When eating a more normal diet, keep eating the recommended foods. Use small plates. Eat slowly and chew well. Stop eating when you are satisfied and not until you feel very full, because if you do, you can stretch the stomach pouch.

What you should eat

1. Some suggestions on what to eat are the following:
2. Eat the correct amount of protein (read the section “Eat enough protein” below).
3. Eat fruits and vegetables if they do not cause problems. Remove the shells. Cook the vegetables to make them easier to digest. Chew them well.

Eat a lot of fiber in your diet.

What you should avoid

Some suggestions on what to avoid are the following:

1. Avoid sugary foods and drinks, as they can cause rapid emptying syndrome (see section “Prevention of rapid emptying syndrome”, below); In addition, they can delay your weight loss or even make you gain weight.
2. Limit your consumption of oils and fats, including fried foods. Excess fat can cause nausea, slow your weight loss and even make you gain weight.
3. Avoid alcohol, as it contains calories but no nutrients; In addition, alcohol can delay its thinning.
4. Do not smoke, as this is a well-known cause of ulcers in the lower part of the stomach.
5. Do not take nonsteroidal anti-inflammatory drugs (NSAIDs) on a regular basis, because medications such as ibuprofen, aspirin and naproxen can cause ulcers in the lower part of the stomach.

How should you eat

1. After the operation, you will have to be careful when eating. Your stomach is very small and can accommodate only a small amount of food. Follow these recommendations at meal times:
2. Do not drink anything during a meal. You will be able to drink liquids 30 to 45 minutes after a meal.
3. Eat in small bites. Chew your food 20 times before swallowing. If you can not chew something completely, spit it out; do not swallow it This will help prevent your stoma from becoming blocked.


1. Stop eating when your stomach feels full. Eating too much or too much can cause nausea and vomiting, as well as pain below the sternum.
2. Do not “chop” between meals. Eating snacks can slow your weight loss and even make you gain weight.