The post-op diet is broken down into 4 separate phases after gastric sleeve surgery. By following these helpful guidelines, you can expect better weight loss results as well as faster healing and recovery. Here are the approved foods and drinks you can and can’t eat after the gastric sleeve.

Post-op Diet Phase 1 Clear Liquids

Phase 1: Clear Liquids

About a day after surgery, patients will begin sipping clear liquids. These include juices like apple, cranberry, or white grape (little sugar or dilute 50/50 with water), water, sugar-free Jell-O, or broth.

Some examples of Acceptable Clear Liquids include:

  • Water or  no sugar-flavored water
  • Herbal tea (just 8 ounces a day)
  • Broth
  • Flavored Water
  • Sugar-Free Jello

Important Note: Make sure you drink 64 ounces of water every stay. It is difficult with a small stomach, so constantly sip, sip, sip throughout the day and keep track of water intake. It is essential to learn the signs and symptoms of dehydration and avoid being dehydrated at all costs!

Patients are encouraged to take small sips and be aware when they feel full. If the patients can be tolerable clear liquids, they will progress into the clear liquids or Pureed Consistency phase.

Learn more about Clear Liquids After Gastric Sleeve

Post-op Diet Phase 2 Thick Liquids

Phase 2:  Thick Liquids

All foods consumed during phase 2 ust be pureed in a blender and thinned so they can fit through a straw. Patients should NOT use straws however to prevent gas and air from getting into the healing stomach. The protein goal at this point in post-op is 60 to 90 grams daily.

Patients are encouraged to eat four to six meals of four ounces each. Eat slowly with the guideline of it taking 30 minutes to eat 4 ounces or a half cup of food.

At least eight cups of low-calorie, caffeine-free liquids should be consumed throughout the day to prevent dehydration and to help digestion. Sip these liquids in between meals and never during meals as it will make you feel full before you have consumed enough food.

Some examples of Approved foods during phase 2 include:

  • Unsweetened coconut, almond or Lactaid free milk; some people become lactose intolerant after surgery
  • Unsweetened applesauce
  • Blended Greek yogurt (no fruit chunks); choose one that has more protein than sugar
  • Cooked cereal with lactose-free milk (Cream of Wheat, grits or oatmeal)
  • Blenderized fruit added to shakes
  • Blenderized soups (made with lactose-free milk, not water)

Avoid these foods during your post-op gastric sleeve experience:

  • Sweets (cakes, cookies, ice cream, pies)
  • Candy
  • Fried foods
  • Honey
  • Sherbet
  • Alcohol
  • High-fat meat (hot dogs, sausages or bacon)

Learn more about Thick Liquids After Gastric Sleeve

Phase 3: Soft-Solid Food

Post-op Diet Phase 3 Soft Solids

About two weeks following your gastric sleeve surgery, you will begin this phase as long as you have tolerated the two phases prior to nausea or vomiting. Focus on protein first with meals and avoid any and all foods that are high in sugar or carbs.

These can be difficult to digest. Cut back to three meals and one protein shake during this phase instead of the four to six small meals.

Some acceptable foods include:

  • Casseroles (watch heavy mayo or cream)
  • Cooked eggs, any type except fried
  • Whole-fat cottage cheese
  • Soft lean meat like fish or canned chicken; meats you can mash with a fork (no red meat)
  • Cooked vegetables, peeled only
  • Blended beans (kidney, lime, butter, pintos or black)
  • Canned fruit (in their juice or water, not syrup)
  • Hot cereals
  • Greek yogurt
  • Soft fish
  • Soft cheese (limited amounts only)

Meals should be no more than 6 ounces.

Avoid soft solids like;

  • Red meat
  • Nuts
  • Popcorn
  • Raw vegetables
  • Fresh fruits
  • High-calorie beverages
  • Fibrous foods (which can cause a blockage)

Learn more about Soft Solids After Gastric Sleeve

Phase 4: Solid Foods

During this phase, one new food is added at a time so the patient can gauge how they react to it. Add bread last as they tend to form into balls and can be hard to go through the new stomach pouch.

Some suggested foods include:

  • Fruits and vegetables
  • Beans and legumes
  • Lean meats
  • Eggs
  • Whole grain products including quinoa, oatmeal, and cereals

Protein is crucial at this point and helps to keep hair loss at bay. As the body adjusts to changes after surgery and the rapid weight loss occurring, patients can experience weight loss three to six months after surgery.

Hair loss can also occur as a result of low zinc and iron intake as well as low protein levels.

Some useful proteins to consume are:

  • Eggs
  • Cottage cheese
  • Low- sugar, high protein Greek yogurt
  • Low-fat cheese
  • Fish
  • Protein powders (Whey and Hemp)
  • Chicken and turkey
  • Legumes
  • Other lean meats
  • Soy products

Learn more about Soft Solids After Gastric Sleeve

Foods to Avoid During All Phases

Approved Foods After Gastric Sleeve Surgery - Sleeve Gastrectomy

Limit or avoid these foods and beverages and only consume in small amounts. These items include:

  • Regular mayonnaise
  • Sour cream
  • Pie crust
  • Cream cheese
  • Hot dogs
  • Margarine
  • Granola
  • Coleslaw
  • Muffins
  • Regular salad dressings
  • Sauces
  • Fried foods
  • Doughnuts
  • Gravy
  • Regular sodas
  • High sugar drinks
  • Bacon
  • Sausage
  • Bologna

Helpful Eating Rules

  1. Eat only when you are hungry and chew slowly.
  2. Eat only small portions as your new stomach pouch can only hold about a ½ cup of food at most.
  3. If you continuously overeat, you will stretch your new stomach pouch.
  4. Stop eating as soon as you feel satisfied.
  5. Avoid any fibrous food as this food can tend to get stuck because it cannot be chewed well enough to break up into pieces.
  6. If you want to eat these types of foods, cut them into small pieces, and chew thoroughly.

Approved Liquid Drinks After Gastric Sleeve

Also, remember to take multivitamins as well as other vitamin supplements to keep your vitamin levels at a healthy level. Calcium, B12, iron, and fish oil are some common supplements taken by gastric sleeve patients. Consult your nutritionist and surgeon for the list of supplements you should follow for your particular health.