Gastric sleeve after surgery - 4 phases (2023)

The gastric sleeve is transforming lives at an alarming rate. Its popularity is due to the fact that it is a relatively short procedure, with high success rates and minimal complications.

Diet overview after surgery

Adherence to gastric sleeve diet guidelines established by board-certified surgeons and nutritionists is critical in the postoperative period.

After gastric sleeve surgery, your stomach's capacity is only 3 to 4 ounces, instead of 60 ounces -- making every bit of food important to make up for the nutritional deficiencies you'll experience after surgery. Find out howchoose a healthy goal weight after gastric sleeve surgery!

Gastric sleeve after surgery - 4 phases (1)

What is the purpose of the gastric sleeve diet?

The gastric sleeve diet is a plan of small bites high in protein, healthy fats with four nutritional goals.

  1. High in protein to promote healing and minimize muscle loss.
  2. Adequate fluid intake to prevent dehydration
  3. Moderate healthy fats and carbohydrates from whole foods such as fruits, vegetables and legumes.
  4. Low in sugar and processed foods to avoid counters or sodas.

See Gastric Sleeve Results - What to Expect After VSG Surgery!

Nutritional goals of the gastric sleeve diet

There arefour main nutritional goals to follow after surgery;. They contain:

  1. Eating the right amount of protein will help minimize muscle loss and aid in healing. Patients also need to learn how to eat properly, which will help them achieve their long-term weight loss goals.
  2. Losing weight should be done in a safe and healthy way.
  3. Then, always drink enough fluids to stay hydrated.
  4. Finally, eat the right nutrients throughout the day through vitamin and mineral supplements.

The most inspiring before and after photos of gastric sleeve patients

Gastric sleeve after surgery - 4 phases (2)

Phase 1 - Pure liquid diet - 5 to 7 days

Phase 1 of the gastric sleeve diet uses only clear or translucent fluids to allow for proper healing and recovery. This phase lasts at least two days after surgery. Take very small sips at a time at first, about a teaspoon every 60 seconds. Then gradually increase your fluid intake to six to eight ounces per hour. Drinkvery slowand refrain from swallowing.

The objective of the 1st phaseis to stay hydrated by consuming at least 48 fluid ounces, optimal goal 64 ounces.

Things to note:

  • Sugary drinks, caffeinated drinks or carbonated drinks are not recommended.
  • Patients should receive enough fluids to prevent dehydration. It is important to calculate and record your intake daily.
  • If the urine is dark in color or your mouth is dry, you are not drinking enough fluids.

Approved clear liquids

  • Water
  • Pieces of ice
  • Drinks without sugar or flavored water (VitaminZero/Propel, PoweradeZero, crystal light)
  • Broth (Beef or Chicken)
  • Sugar Free Jell-O
  • Sugar free popsicles
  • Herbal tea
  • Light or diluted (60/40) juices (apple, white grape, cranberry)

Phase 2 - Full liquid diet - 5 to 14 days

The goal of the 2nd phasestay hydrated and consume between 60-90 grams of protein

This diet provides a wide variety of fluids and protein supplements. This will give your new pouch and digestive tract time to heal properly and give you time to get used to your new stomach/pouch.

A good rule of thumb for what is allowed on this diet is anything of the consistency of what can easily be strained through a straw. However, remember. at this stage you should not drink anything through a straw!!!!

Begin taking the multivitamin, calcium, and iron daily as directed for two to three days in phase two. If you need advice or vitamins in this area, please contact us to purchase recommended vitamins designed for your specific bariatric needs.

Approved full fluids

  • All food from the previous stage.
  • Protein powders
  • Greek yogurt (remember it should have more protein than sugar - Fage/Chobani plain Greek yogurt or Dannon's Triple Zero
  • Almond, cashew or coconut milk - Sugar free
  • Natural applesauce
  • Hot cereal like Oatmeal/Cream of Wheat/Kashi Hot Cereal
  • Pudding without sugar
  • Soups (choose higher protein soups like bean soup, you can get thick soups and stir before eating)
  • Avoid all fizzy drinks (fills the stomach with gas), sugar (added calories that counteract weight loss), and coffee (it's acidic and can cause acid reflux problems after surgery. It's also a diuretic, which will dehydrate you )
  • Drink at least 48 oz. of fluids and aim for 64 fluid ounces per day to prevent dehydration. Sports drink bottles with a size indicator on the side ensure you drink enough. Remember that you can't swallow liquids, so you'll want to drink small amounts throughout the day.

During phase 2, it is important to drink a high-quality protein supplement. Your goal is 60 to 90 grams per day. To determine your protein needs, take your ideal healthy weight and divide it by 2.2. This will give you the amount of protein you need to reach a healthy weight and maintain your lean body mass.

Phase 3 - Soft Food Diet - 15 to 21 days after surgery

3rd phase objectiveis to start weighing food: 4-6 ounces total per meal, getting 20 grams of protein per meal (3 ounces will always be protein) - Protein first!

Chew all your food thoroughly to the consistency of applesauce. If you don't follow these precautions, you may experience vomiting, stomach irritation, and bloating. You may also have a blockage in your small stomach.

If solid foods cause nausea and vomiting, go back to your previous liquid diet. Then you can slowly add soft foods and eventually progress to solid foods. IF VOMITING AND NAUSEA CONTINUE CALL YOUR DOCTOR IMMEDIATELY.

Imagine your new case is shaped like a funnel. You can pour any liquid into this funnel and it will drain out the bottom. The same goes for your pouch when you only consume liquids. So you don't want to drink your calories or overeat.

As part of your new life, you want to stop drinking 30 minutes before a meal and 30 minutes after a meal.

Approved soft foods include:

  • You start weighing your food at this stage - Aim for no more than 6 ounces of food - 3 ounces of protein, one ounce of healthy fat and two ounces to play with adding vegetables, fruits or carbs
  • Your goal is to get 20 grams of protein with each meal
  • Add only ONE food at a time
  • Scrambled eggs (soft-boiled, poached)
  • Salad owner
  • Tuna well moistened with mayonnaise
  • Chicken salad, salmon, wet with mayonnaise
  • cottage cheese
  • that
  • Tofu
  • Fruit (puréed, canned - anything soft)
  • Vegetables (mashed, canned and slow cooked to soften)
  • Baked beans with cheese
  • The meat is pressure cooked to make it tender
  • bananas
  • Sweet potatoes and potatoes (mashed only)
  • Greek yogurt

Things to keep in mind with phase 3

  • It is important to eat only until you feel full and no more!
  • eat a high protein, low sugar, diet.
  • Never eat and drink at the same time.
  • Never eat more than 4 ounces of food at a time.
  • Chew your food well.
  • Aim for 800 calories daily.
  • Never eat before bed and avoid spicy foods.
  • Always check your labels before consuming foods high in fat, sugar or carbohydrates.

Phase 4 - Solid Food Diet - 21 days onwards

At this stage, your stomach should be able to process solid foods better. From now on, these foods are the foods you will eat for the rest of your life. Ultimately, you can eat a healthy, balanced diet in small portions.

You want at least three ounces of protein at each meal. You may want to get a digital pocket scale to weigh your food at first so you know what three ounces of protein looks like. foods. You want to train yourself to eat protein from scratch. Eat three bites of protein so everyone bites into something different (three to one rule).

It's easy to get addicted to certain foods, so from this stage onwards it's imperative that you slow down and chew your food well, pausing between bites.

Recommended foods

Don't forget to eat protein first. Be sure to get three ounces of protein with each meal. Add three ounces of healthy fats, fruits, vegetables, or starches if you can tolerate them. Pay close attention to how you feel when introducing new foods.

  • Vis
  • Shrimp
  • Eggs
  • Kip
  • Tofu
  • Products without meat
  • Beans
  • cottage cheese
  • Greek yogurt with low sugar

Successful eating behavior

Diet for Gastric Sleeve Surgery: If You Passed Itstomach sleeveyou may feel nauseous or become seriously ill if you eat too much.

  • Add only ONE new food at a time!
  • Avoid starchy foods such as white rice, pasta, bread.
  • I'm chewingdeepand little by little.
  • Protein supplements: 60-90 grams
  • Drink at least six to eight cups of water and other low-calorie, non-carbonated beverages between meals.
  • To stopdrink thirty minutes before eating andDO NOTdrink up to thirty minutes after a meal.
  • TO EATsix small liquid and mixed meals a day, but add one solid food to one meal on the first day. Add another solid food each day.
  • AVOIDall raw fruits and vegetables, nuts, popcorn, pickles, olives or relishes.
  • folderrecord all new foods and any problems you have with them in a food diary and let your doctor know about any problems or questions you have.
  • I'M CHEWINGswallow your food well before swallowing. The consistency of the food should be like mashed potatoes. Make sure each bite is very small (like feeding a baby) and keep eating small amounts slowly. Eat about two tablespoons over ten to fifteen minutes.
  • GO UPto take your multivitamins, calcium supplements, iron, and B12 supplement as directed.
  • AVOIDdrinks that contain alcohol or caffeine and drinks that are carbonated.
  • CAUTION, DO NOT use a straw or chewing gum!

Gastric Sleeve Diet - Sample Menu

Phase 1: Clear liquid sample menu

  • Important: You are not weighing your liquids. you measure by volume. You can take as much fluid as your body wants. The minimum target is 48 grams to prevent dehydration.

Waking up

  • 6 oz hot herbal tea (no milk/cream) or broth (warm liquids help relax tummies)


  • 08:00 - 6 ounces of juice - Apple or cranberry, white grape, Gatorade, vitamin water (fifty percent water, fifty percent juice)
  • Sugar Free Jell-O

Dinner speech

  • 10:00 - 6 oz hot tea (no milk/cream) or broth


  • 12:00 - 6 hours vitamin water
  • Sugar Free Jell-O

Dinner speech

  • 3:00pm - 6 ounces of herbal tea or broth


  • 5:00 p.m. 6 ounces white grape juice (50% water, 50% juice)
  • Sugar-free Jell-O or sugar-free fruit

Evening snack

  • 6 oz herbal tea or broth

Phase 2: Menu of viscous liquid samples


  • 1-ounce package of high-protein oatmeal made with almond milk
  • ½ - 1 scoop of unflavored protein isolate

Dinner speech

  • Protein shake (at least 20 grams of protein) - clear or thick shake


  • 4 ounces Greek-style yogurt mixed with almond milk (choose a yogurt with more protein than sugar)

Dinner speech

  • Clear or thick liquid protein shake


  • Mashed soup

Evening snack

  • Sugar-free pudding with a scoop of protein powder mixed with coconut milk

Stage 3: Soft Foods sample menu


  • 2 scrambled eggs & 1 oz. string cheese (3 ounces)

Dinner speech

  • Protein drink


  • 3 oz canned chicken
  • 1 ounce blended avocado


  • 4 ounces cottage cheese
  • 1 ounce mixed fruit

Evening snack

  • Protein shake or pudding with mixed protein

Stage 4: Menu of solid food samples


  • Protein drink

Dinner speech

  • Cheese sticks


  • 2 ounces chicken
  • 1/4 avocado
  • 2 ounces black beans

Dinner speech

  • 15 almonds


  • 3 ounces of salmon
  • 2 ounces green beans
  • 1 TB olive oil

Evening snack

  • Triple Zero Greek yogurt, up to 1/4 cup raspberries

Weight loss plateaus

Most of the time, patients who find themselves on weight loss plateaus can quickly make lifestyle changes to jump off the plateaus. Patients who consume too many carbohydrates can easily get stuck in a plateau. Minimizing carbs usually overcomes weight loss plateaus—try swapping carbs for protein and fiber, which will help you feel fuller for longer.

If you're on a weight training/exercise plan, you may get stuck in a weight plateau. However, your plateau can be misleading or illegal, muscle weighs more than fat and patients can easily be fooled into thinking they are not losing fat when they are. It's important to look at your body to see how you're doing.

Exercise instructions

During the first 30 days, patients should not participate in vigorous activities such as weight lifting, running, or abdominal exercises. We recommend that patients start with 20 minutes of walking for the first 14 days after surgery. After 15 days, patients can exercise up to 30-40 minutes a day.

  • Swimming– Wait at least 15 days before using the bathroom or pool. Wounds can easily become infected if the wound does not heal completely. In general, swimming is a great exercise that can include resistance training.
  • lifting weights- Wait at least 30 days after surgery to incorporate light resistance training. Use weights you can handle and continue to include cardio.

Read more about exercise after bariatric surgery

Vitamins and supplements

After gastric sleeve surgery, patients must follow a lifelong regimen of vitamins and supplements. Often in restrictive bariatric surgery are deficiencies in essential vitamins and minerals. Patients should take the following supplements:

  • multivitamin
  • Vitamin b12
  • Calcium


Mexico Bariatric Center has developed multivitamins according to ASMBS guidelines specifically for gastric sleeve patients. MBC strongly recommends that patients take these multivitamins for the first year after surgery and thereafter for successful weight loss. Here are the highlights:

  • Make sure the vitamin contains folic acid (you need at least 400 mcg per day) and iron.
  • Menstruating women or patients with anemia should take a multivitamin with supplemental iron.
  • Approved multivitamins: Centrum Performance, Flinstones, Costco vitamins and many other brands available in stores internationally.

Vitamin B12:

  • Patients will need to supplement their diet with B12, a deficiency is quite common and can lead to serious neurological problems.


  • Patients should take a calcium/vitamin D complex supplement. Supplements can help prevent osteoporosis.

Guide to gastric sleeve surgery

  • Approved Foods You Can and Can't Eat After Gastric Surgery!
  • 5 things to get used to after gastric sleeve surgery
  • Gastric sleeve surgery cost
  • Risks for gastric sleeve surgery
  • Side effects of the gastric sleeve
  • Preoperative diet: Gastric sleeve diet
  • Recovery after gastric sleeve surgery
  • Bariatric Surgery Postoperative Support
  • Medications to avoid after gastric sleeve surgery
  • Avoid these 6 dangerous mistakes after bariatric surgery
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