Gastric Bypass Diet | Weight Loss Surgery in Iran | Iranmedopia

Gastric Bypass Diet

A gastric bypass diet includes what you can and cannot eat after this weight loss surgery in Iran. After gastric bypass in Iran, doctors usually recommend some tips to you. Recommendations vary depending on your situation. In this article, we have told you everything you need to know. A gastric bypass diet helps you to heal and change your eating habits. You should know what types of food and how much you can eat at each meal. Closely follow your diet to lose weight safely. You may want to know: what is the purpose of diet after gastric bypass? On the other hand, you may be worry that some foods will have to be omitted from your life after weight loss. 

Don’t worry and just read our article. This article is a complete gastric bypass diet guide.

Dos and Don’ts of Gastric Bypass Diet

Dos and Don’ts of gastric bypass generally include the following:

  • Eat and drink slowly (Don’t immediately start eating regular food)
  • Eat small meals and more high-protein foods 
  • Eat low-fat and sugar-free foods 
  • Drink fluids between meals (avoid carbonated beverages)
  • Chew food thoroughly
  • Take vitamin and mineral supplements (fruits or vegetables with every meal)

In the first week after gastric bypass surgery, only consume clear liquids. The clearness of the liquids should be such that you can see through it the other side of the glass. The clear liquid may include water, fat-free milk, and fat-free broth. Drinking will prevent dehydration. 

Signs of dehydration:

  • Your urine color is dark yellow to orangish
  • Your urine smell is bad

This indicates that your body needs water.

Eat and drink slowly

Eating and drinking slowly prevent dumping syndrome. Dumping syndrome occurs when foods and liquids enter your small intestine rapidly and in larger amounts than normal. Therefore, if you don’t follow this option you will suffer from:

  • Nausea
  • Vomiting
  • Dizziness
  • Sweating
  • Diarrhea


  • Take at least 30 minutes to eat your meals
  • Take 30 – 60 minutes to drink 1 cup of liquid
  • Wait for a half-hour before or after each meal to drink liquids

Eat small meals and more high-protein foods 

Keep your meals small. For example, Start with six small meals a day. Gradually move to four meals. Eventually follow a regular diet and three meals a day (each meal includes about a half-cup to 1 cup of food). Eat high-protein foods, before eating other foods in your meal.

Eat low-fat and sugar-free foods 

Low-fat and sugar-free foods travel slowly through your digestive system. (preventing dumping syndrome)

Drink fluids between meals (avoid carbonated beverages)

Drink at least 8 cups (1.9 liters) of fluids a day. Notice drinking too much liquid is not good. It prevents you from eating enough nutrient-rich food.

Chew food thoroughly

Chew food thoroughly because the new opening that leads from your gastric into your small intestine is very narrow. Large pieces of food can lead to blockages. So take small bites of food and chew them to a pureed consistency before swallowing.

Take vitamin and mineral supplements 

After gastric bypass, your body won’t be able to absorb enough nutrients from your food. You may need to take a multivitamin supplement every day for the rest of your life.

Foods you cannot eat after gastric bypass surgery

There are some foods you cannot eat after gastric bypass. For example, you should avoid food with empty calories (or low-calorie foods). Don’t eat Alcohol, dry foods, and some foodstuffs like bread, rice, and pasta. High-Fat food, sugary, and highly caffeinated drinks are forbidden. So, avoid certain foods in the gastric bypass diet.

Foods you can eat after gastric bypass surgery

You should eat soft foods after gastric bypass surgery. Here are some foods you can eat about a month after gastric bypass:

  • Well-cooked chicken (and fish)
  • Well-cooked vegetables
  • Sweet potatoes
  • Low-fat cheese
  • Fruit
  • Low-sugar cereal

The benefits of diet after gastric bypass

The benefits of diet after gastric bypass are significant. The diet allows your gastric to heal without being stretched by the food you eat. You get used to eating less. As a result, your smaller stomach can comfortably and safely digest. Above all, it helps you lose weight and avoid gaining weight. Eventually, you will be safe from the side effects and complications of surgery.