Diet Plan After Gastric Bypass - Stage 2 - Semi-Liquid Diet

Stomach Bypass Eating Program
"Semi-Liquid Diet"
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Diet Plan After Gastric Bypass Stage 2 - Semi-Liquid Diet

Note: All foods must be of a consistency of thinned mashed potatoes. Add non-fat dry milk powder to all foods and beverages to increase the protein.


  • Skim or 1% milk
  • “No Sugar Added” Carnation Instant Breakfast made with skim milk
  • Blenderized soups (make with skim milk instead of water)
  • Blenderized fruit added to shakes made with skim milk and light/nonfat yogurt
  • Blenderized meat added to blenderized cream soups or mashed potatoes
  • Cooked cereal thinned with skim milk (oatmeal, grits, Cream of Wheat)
  • Thin blenderized casseroles
  • Blenderized beans (black, pintos, lima, kidney, lima, northern, butter, lentils)
  • Unsweetened applesauce with non-fat dry milk powder
  • Fat-free refried beans with melted fat-free/reduced fat cheese
  • Mashed potatoes made with skim milk
  • Blended sugar-free yogurt
  • Cottage cheese (fat-free/low fat)

You will start with small amounts of these liquids because you will feel full quickly. At first you will have to drink small amounts frequently (2-4 ounces at a time). After a few days your daily intake of the liquids listed above should be at least 24 ounces (3 cups). Eventually you will be able to take 3 liquid meals of 4-6 ounces each. Drink slowly. It should take 30 minutes or more to drink 4-6 ounces (1/2 to 3/4 cup).

Drink Liquids to Prevent Dehydration

At lease 6-8 cups of low calorie liquids should be consumed gradually throughout the day to prevent dehydration.


  • Water or flavored water
  • Crystal Light
  • Diet sodas (flat)
  • Diet Snapple
  • Decaf tea and decaf coffee
  • Diluted juices (1/2 water, 1/2 juice- limit)
  • Skim milk
  • Sugar-free Kool-Aid
  • Sugar- Free Tang

A multivitamin with minerals, which includes iron and zinc, should be taken daily for the rest of your life to prevent hair loss and to improve overall nutrition. During the first few weeks after surgery use a children’s chewable vitamin/mineral supplement and then advance to pill form of a multivitamin with minerals if you desire. Medications may be taken in liquid or chewable form, but most pills are easily swallowed.

Reduce Dumping Syndrome and Digestive Upset

Concentrated sugars and alcohol can cause vomiting and/or diarrhea (dumping syndrome) so avoid:

  • Candy-including chocolate
  • Sweets
  • Regular sodas
  • Honey
  • Kool-Aid
  • Molasses
  • Cakes
  • Preserves
  • Sherbet
  • Ice cream
  • Alcohol (including beer)
  • Doughnuts

Different people have different foods they can and cannot tolerate. Do not be disturbed if you find some foods do not agree with you at first. You may be able to tolerate those foods later.

Sample Menu of Semi-Liquid Diet

(Consistency of thinned mashed potatoes)

1 cup “No Sugar-Added” Carnation Instant Breakfast mixed with skim milk

Snack #1
1/2 cup cottage cheese

Blenderize 1/2 cup fat-free refried AND 1 ounce of melted fat-free/reduced fat cheese

Snack #2
Blended sugar-free yogurt

Blenderize 1/4 cup meat AND 1/2 cup cream soup AND 1/4 nonfat skim milk powder

Note: You may have to eat more frequent meals and consume smaller amounts at each meal at first. But try to take in at least 24 ounces (3 cups) of nutritious liquids every day.

Between Meals
Have at least 4 cups low calorie liquids, sipped slowly during the day.

Next Pages:
Stage 3 - Semi Solid Diet
Stage 4 - Low-Fat Solid Diet

Source: University of Virginia Health System


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Laparoscopic or open bariatric surgery, such as gastric banding or bypass is not an easy solution to morbid obesity and weight loss. It is a serious surgical procedure, involving health risks. To produce lasting weight loss it requires a long-term patient commitment to eating a healthy diet and following a regular program of physical exercise. Life-long use of nutritional supplements may also be necessary. So, before deciding, discuss your options fully with your doctor. © 2003-2018 Bariatric-Surgery.Info - Terms - Contact - Information - Resources