Diet and Lifestyle Gastric Bypass

Diet Guidelines after Gastric Bypass Surgery

Gastric Bypass Diet Guidelines
Gastric Bypass Diet - no soda or caffeine

No soda or caffeine

After having a gastric bypass surgery, your small intestine has been re-arranged to help you absorb fewer calories and your new, smaller stomach pouch helps you to eat less at meals. Here is a quick guide to the foods you can and should eat, as well as, the foods you should limit or avoid.

Phase – 1 (For First Few Days after Surgery)

This phase is critical as it is the most difficult to adapt to.

  • The prime focus is on liquid diets which mainly comprise clear fluids that are low in calorie and preferably with no sugar.
  • Patients are advised to stay away from carbonated drinks, caffeinated beverages and also any substances containing alcohol as they may cause nausea and bloating.
  • You may sip or drink liquids slowly over an hour. Starting with 1 oz per hour and gradually moving to 6 oz per hour.
No Sipping through Straws

Don’t sip using a straw

Physician’s Tip

DO NOT use straws as the additional air may cause gas, discomfort and bloating. 

Physician’s Choice

Your surgeon may guide you as to how to go about choosing the right liquids for post gastric care. Some of the safe and healthiest choices are listed below:

  • Clear water and teas (herbal and decaf only)
  • Broth, soup (clear only)
  • Fruit juices (diluted only)
  • Diet drinks such as diet Snapple, Crystal Light juice, etc.
  • Diet gelatin, Ocean Spray light juices

Your physician will recommend a high quality protein supplement until you reach phase 2. Protein helps to accelerate healing, keep you full between meals, and is generally well tolerated.

Physician’s Helping Hints

  • Proteinex
    Protein-rich Diet

    Protein-rich Diet

  • Extreme Protein
  • Soy Protein
  • Whey Protein
  • The Edge
  • Pure Protein
  • Designer Protein
  • No-sugar added Carnation Instant Breakfast Mix

Phase – 2

After having developed tolerance to liquids, you can now move on to soft and pureed foods two to three weeks after your surgery.

  • Take no more than 2 bites per minute and put your fork or spoon down between bites.
  • Chew your food thoroughly and pause for 1 minute after eating 4-6 bites.
  • There should be very low fats and no concentrated sugars in your diet.
  • Add only pureed foods to your diet such as beans, soft fruits and well-cooked vegetables.
  • You can also add high protein foods like cottage cheese, lean meats (ground or blended), eggs and fish but only in pureed form.
  • Liquids such as water, skim milk, sugarless juices and clear broths (without cream) can be used to blend solid foods to give them a paste-like consistency.

Choose a goal, stick to it, and experience the changes! 

Weight Loss Inspiring Quote

Physician’s Tip

  • DO NOT eat and drink simultaneously.
  • There should be a gap of at least 30 minutes between a meal and a drink.
  • If you are fond of spicy or dairy foods, make sure you add them slowly and in very small quantities as your digestive system is still very sensitive.
  • STOP EATING at the first sign of fullness.

Physician’s Suggested Food Chart

  • Oatmeal without added flavors Diet after Gastric Bypass Surgery
  • Pureed chicken, tuna fish and eggs
  • Cooked and blended carrots and beans
  • Diet pudding
  • Fruits such as bananas, water melons, cantaloupe (seeds and skins are to be avoided)
  • Yogurt (plain), tofu, cottage cheese (low fat only)

Phase – 3 (After Eight Weeks)

Entering this phase is like almost getting back to your normal diet and routine but with some care and precision.

  • Your foods need not be pureed anymore but they should be low fat and not have any concentrated sugars.
  • You are still required to chew your food thoroughly and properly, and wait for 5 minutes between bites.
  • Any liquids that you want to consume must be taken at least 30 minutes after your meal.
  • Always stop eating when you begin to feel full. Eating past this can cause vomiting and potentially lead to your stomach pouch stretching.

Physician’s Suggested Food Chart

  • Add lean meats to your diet such as chicken, turkey, lean beef and sea food as they satiate you sooner and help in the healing process. Cook them thoroughly (only bake or boil).
  • Go for light yogurt, scrambled eggs and tuna fish.
  • Move to dairy products like low fat cheese, cottage cheese (preferably with 1% fat).
  • High protein sources like soy, beans and lentils can also be included gradually.

Physician’s Tip

  • Add raw fruits or vegetables and fibrous meats only after 6 to 8 weeks of surgery.
  • DO NOT take additional iron supplements with calcium.

Related Articles

  • Supplementing Meals With Protein Shakes 6 Months Post-Op

    A client who had her weight loss surgery in Mexico asks: Is it OK to supplement meals with protein shake (6 months after bariatric surgery, especially when one in busy;...
  • Making Vegetables Your Main Dish at Meal

    Question: How do you include vegetables as the main dish at a meal? Our US-Registered Bariatric Dietitian answers: To start including vegetables more often as the main dish at meals,...
  • Is it OK to Drink Coffee Before Bariatric Surgery?

    Yes, you can have regular coffee or tea before surgery. Limit coffee to 8-16 oz per day and avoid coffee drinks that contain a lot of sugar, such as flavored...
  • Post-Op Gastric Sleeve Diet Guidelines

    Post-Op Sleeve Gastrectomy Diet

    A well-balanced, nutritional diet is vital in the months following the surgery. Subsequent to surgery strict liquid diet is mandatory to increase the efficacy of the procedure and reduce certain...

US-registered Bariatric Dietitian

US-registered Bariatric Dietitian
Katelyn Mock is a US-registered Bariatric Dietitian certified by the American Academy of Nutrition and Dietetics. With more than 8 years of experience in formulating and reviewing diet programs across various hospital settings, Katelyn has also served as the Lead Bariatric Dietitian for the Ohio State University Medical Center.

On-site Bariatric Nutritionist in Tijuana