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Bariatric Surgery Post Op Diet

Understanding Your Bariatric Surgery Pre

The Bariatric Surgery Program Post-Op Diet, Part 1

There are multiple reasons why the pre bariatric surgery diet is important. However, its main purpose is to reduce the size of your liver.

Its quite common for overweight people to have a fatty and enlarged liver. An oversized liver can make it difficult, or sometimes even impossible, for your Surgeon to access your stomach during surgery. In order to make the surgical procedure less complicated and speed up your recovery afterwards, you must follow the pre bariatric surgery diet very carefully.

Prior to attending the first consultation with your Surgeon and dietitian, youll be asked to have blood taken. This will allow us to screen for medical issues, such as nutritional deficiencies for iron or Vitamin D. Your Surgeon and dietitian will also look at your Body Mass Index and review your blood test results.

In particular, well focus on your Liver Function Tests to determine how long youll need to follow your pre bariatric surgery diet. Depending on results, your pre bariatric surgery diet may need to be followed for anywhere from 2 weeks to several months before your surgery takes place.

The pre bariatric surgery diet menu consists of a VLED, which is typically Optifast . The Optifast range consists of shakes, desserts, soups and bars and you will consume three of these options each day.

Start Your Vitamin/mineral Supplements Day 8 After Surgery

Buy chewable or gel cap supplements for best absorption. Do not buy gummy or soft chews.

Vitamins suggested post-bariatric surgery

  • Chewable calcium citrate with Vitamin D three times a day
  • Chewable complete multivitamin once in morning surgery)
  • Vitamin B12, 500 mg tablet once a day
  • Vitamin B-complex tablet once a day
  • Liquid iron once a day
  • Vitamin D3 1000 IU once a day

Immediately After Weight Loss Surgery

Expect to be on a clear liquid diet for about a week after the surgery. Clear liquids that are acceptable to take in include:

  • 100 percent fruit juices
  • Broths

Avoid carbonated drinks and alcohol, which provides extra calories but little nutrition. After gastric bypass and gastric sleeve surgeries, alcohol is absorbed more quickly in the body. This means post-op patients reach higher alcohol levels more quickly and maintain them for a longer period of time, which can also lead to alcohol dependency.

After surgery, you should also start taking a multivitamin every day. Continue to do so for the rest of your life to ensure youre getting adequate vitamins, minerals and nutrients. Be sure to look for a multivitamin that includes vitamin D, calcium, iron and vitamin B12.

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Vlcd And Vlckd Before Bs May Reduce Surgical Risk

Although BS has a low mortality rate, surgical complications remain common and partly dependent on patient factors like age, sex, and comorbidity . Laparoscopic surgery in patients with severe obesity is challenging because of the thickness of the abdominal wall, intra-abdominal obesity, possible mesenteric thickening, and hepatomegaly . The presence of visceral fat can increase the complexity and risk in patients undergoing any type of abdominal surgery . Thickened abdominal walls may limit precise surgical movements during laparoscopy, and intra-abdominal obesity can limit visibility during surgical procedures. Nonalcoholic fatty liver disease is a condition frequently complicating obesity that can lead to an increase in liver fat infiltration, mainly in the left lobe, making the liver brittle and more susceptible to injury and bleeding. During laparoscopic bariatric surgery, hepatomegaly and visceral fat in the left upper quadrant may limit preliminary exposure of the surgical field and may increase the conversion rate and operative time . The overall conversion rate in Roux-en-Y gastric bypass is approximately 4%, and an enlarged liver is responsible for approximately 50% of the conversions .

Dietary Guidelines Post Bariatric Surgery

Gastric Sleeve Diet

Bariatric surgery doesn’t eliminate dieting altogether. It means that if patients adhere to the prescribed diet for the rest of their lives, they’ll lose the excess weight and keep it off. On the contrary, if you ever go off the diet, you will gradually regain the weight lost.

Its important to start implementing this diet even before the surgery because pre-surgery weight-loss helps the surgeon by making the laparoscopic approach easier and safer and increases the likelihood that the surgery can be completed less invasively.

Other dietary requirements are basic common-sense eating. With sensible eating and exercise habits , the weight-loss can be easily maintained after surgery.

The long-term goal of weight-loss surgery is to lose approximately 55 to 75 percent of your excess weight. The end result of weight-loss surgery is that patients will continue to require only small portions of food and eventually be able to tolerate all types of foods. Patients bodies will be satisfied with smaller amounts of food and they wont have continued cravings for larger quantities of food at mealtimes.

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Within 24 Hours Of Bariatric Surgery

A few days prior to your bariatric surgery, the hospital you are planning to attend for surgery will notify you of your operation time. They will also tell you when to start avoiding all food and fluid consumption, which is normally during the 12 hours leading up to your surgery. This nil-by-mouth fasting will ensure that you have an empty stomach at the time of surgery.

Food Intolerance And Changes In Food

Studies reported marked reductions in hunger and more postprandial fullness after BS, resulting in a reduced meal size without compensatory increase in meal frequency . Several factors have been related to the reduction in appetite and energy intake. Alterations in gastrointestinal anatomy result in neurological and physiological changes affecting hypothalamic signaling and gut hormones . Furthermore, BS not only increases satiety but also affects food preferences, including increased acuity to sweet taste, and decreased hedonic evaluation of sweet and fatty foods . GLP-1 is released in the gut from the sweet-sensitive taste cells after stimulation with sweet compounds, suggesting that this gut peptide might contribute to the increased sweet taste sensitivity after BS . It was shown that meals of solid texture and smaller meals were better tolerated and generated less hypoglycemia than large and/or liquid meals after RYGB . Faulconbridge et al. demonstrated that the neural response of high-calorie foods 6 months after RYGB and SG decreased significantly and remained stable in the control group .

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Stage : Soft And Moist Foods

This stage of your diet will begin about 2 weeks after your surgery and your follow up appointment with Dr. Balsama, lasting 2 full weeks. These foods should be easy to pull apart with a fork, and each meal should be about ½ cup or 4 ounces in size. However, you should stop eating as soon as youre full, even if this amount has not been reached! Examples of soft foods to eat during this stage are:

  • Lean proteins like slow cooked chicken or pork
  • Canned chicken, tuna, or crab
  • Egg whites
  • Over-cooked vegetables like zucchini, squash, cauliflower, or mushrooms
  • Soft fruits like melons, peaches, and avocados

Continue to sip fluids between meals but remember the 30/30 rule: Do not drink 30 minutes before or after a meal. Continue your daily protein drink and minerals as well.

Pregnancy And Contraception After Weight Loss Surgery

How big is a bariatric portion? Dr. Crawford talks about the post-op diet!

Women are usually advised to avoid becoming pregnant during the period of most significant weight loss in the first 12 to 18 months after surgery.

This is because weight loss surgery can affect your vitamin and mineral levels. If your levels are low while you’re pregnant, there’s a risk it could harm your baby.

It’s a good idea to:

  • use contraception until advised it’s safe to become pregnant ask your doctor about the best type, as some are not suitable for women who’ve had weight loss surgery
  • speak to your doctor if you become pregnant soon after surgery or you’re planning a pregnancy at any stage after surgery they can check your vitamin and mineral levels, and advise you about supplements

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Stage Ii: Bariatric Soft Mushy Pureed Diet First Month After Surgery

Stage II of your post-bariatric surgery diet, soft foods from the list below can now gradually be added. Be sure to continue following all of our additional instructions and guidelines for your bariatric surgery diet to ensure a smooth and comfortable experience and recovery process.

3 meals per day with 2 NYBG protein shakes or supplements containing 15-20 grams of protein each between meals.

Appropriate Foods To Add During The Pureed Diet Include

Scrambled eggs/egg substitute Low-sugar Yogurt Blended cottage cheese Low-fat cream soups Nonfat refried beans

To make your own purees, you will need to chop food into small pieces then blend or use a food processor to reduce the texture. For most foods, you will need to add liquid to thin the mixture enough to achieve a puree. To do this, add milk or broth. You are looking to achieve a thin, mashed potatoes like consistency.

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Stage : Full Liquid Diet Days 3 To 17 Post

During the first two weeks after your discharge from the hospital you will have to drink liquids only. Solid foods could cause pressure on the sutured line of the stomach and stretch the new stomach pouch. This might cause vomiting and pain. Liquid diet will also give enough time for the stomach tissue to heal. To insure an adequate intake of protein, calcium and other nutrients, the liquid diet has to be based on foods that contain protein.

Calorie daily intake: 500 600 CalType of exercising: walking

  • Vegetable soup, very thin, blended and strained
  • Almond, coconut or soy milk without added sugar

Note: Protein powder can be added to chicken broth, soups or Jell-O. When making soups, avoid vegetables high in fiber and those that produce gas: cauliflower, broccoli, asparagus, celery, mushrooms.

Exercise After Weight Loss Surgery

Gastric Bypass Diet: The Perfect Meal Plan for Your Post Bariatric ...

As well as eating healthily, you’ll need to exercise regularly to help you lose as much weight as possible after the operation.

You may be given an exercise plan. This will usually involve increasing your activity levels gradually as you recover from surgery.

Once you’ve fully recovered, you should aim to do regular activities that are intense enough to leave you feeling out of breath and make your heart beat faster, such as:

  • brisk walking
  • advice and support about diet and exercise
  • emotional or psychological support

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What Is The Post

Your post-op diet what you eat in the weeks and months after your gastric sleeve surgery is just as important as your pre-op diet. You will begin with liquids and then gradually reintroduce solid foods.

Following your post-op diet is essential if you want to realize the benefits of a bariatric procedure. It will also help you avoid potential health complications, including diarrhea, nausea, vomiting, constipation, and gastric leaks. Here is a week-by-week diet plan detailing what to eat after a gastric sleeve surgery:

Bariatric Diet After Surgery

Immediately after the weight loss surgery procedure and for the rest of patients life it is very important to follow a new lifestyle starting from eating habits. Your surgeon, dietician and psychologist will support you to start and go through five-phase post-bariatric surgery diet plan.

Please remember that: 1 fluid ounces is equal to 0.029 Liters 1 ounce is equal to 28.34 grams 1 cup = 8 fl. oz. = 250 ml.

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To 4 Weeks After Weight Loss Surgery

About a week after your weight loss surgery, you may move to a full liquid and pureed diet. Its important to avoid ingesting solid foods during this phase, and only eat blended foods to allow your stomach to properly heal. In addition to clear liquids, foods you can have during this time include:

  • Protein shakes
  • Yogurt
  • Pureed vegetables and meat, including chicken, beef or turkey

Aim to drink at least 64 ounces or more of fluid every day to prevent dehydration, constipation and kidney stones. Avoid drinking water 30 minutes before you eat, and wait until 30 minutes after you eat to drink water. This ensures you are able to get the proper nutrition you need without already feeling full. Take small sips as you drink, and stop drinking when you feel full.

Are You Eligible For Bariatric Surgery

Bariatric Surgery Full Liquid Diet

Discover if youre a suitable candidate for bariatric surgery here. You can also learn more about obesity surgery options by downloading our Obesity Surgery Information Brochure. Reading this information is a mandatory requirement prior to attending an appointment with us.

If youve already read about your options and want to proceed to the next step of your weight loss journey, you can request an appointment via our contact form or call us on 02 4032 8777.


The Bariatric Surgery Patient. Nutrition Considerations. Vol 42, No 8, Aug 2013, pp547-552. C Shannon, A. Gervasoni, T. Williams

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What Is The Bariatric Surgery Diet Plan And Why Does It Matter

The bariatric surgery diet plan can be broadly categorised as follows:

Bariatric Preoperative Diet In the 2 weeks leading up to your surgery date, you will be placed on a Very Low Energy Diet . This typically involves consuming a formula like Optifast.

Bariatric Postoperative Diet After surgery, there are 4 main diet stages:

  • Full Fluid Diet For the first 2 weeks after surgery, you will be instructed to consume nothing but fluids that are thin enough to be sucked through a straw.
  • Puree Diet 2-4 weeks after surgery, you will be eating smoothly pureed foods, similar to baby food in texture.
  • Soft Diet 4-6 weeks after surgery, your food intake will begin to normalise in terms of texture and you will be able to eat small amounts of soft foods.
  • Normal Diet 6 weeks and beyond, you will be enjoying small portions of normally textured foods.

Every step of the bariatric surgery diet plan supports your healing after surgery and sets you up for weight loss success. Lets explore each stage in more detail.

The First Few Weeks/months After Your Bariatric Surgery

Stage 1: Fluids only – follow this stage for 3-4 weeks

Youll start taking sips of water the day of your operation , and then move on to other clear fluids such as diluted fruit juices, tea or coffee, low fat milk or Marmite and Bovril drinks. Its common to experience nausea or vomiting at this stage as your body is recovering from the surgery. You will be offered anti sickness medication in hospital and given some to take home as well.

If you can handle clear liquids, you can progress to a full liquid diet with liquids that are smooth without lumps or seeds i.e thin enough to go up a straw. Your diet will consist primarily of protein shakes/water, milk, soups and clear liquids. You must avoid all fizzy and sugary drinks.

The most important aspect of your diet immediately following bariatric surgery is to keep well hydrated. Make sure you keep sipping clear liquids between meals . Take little sips and stop when you feel full or any pressure. Dietitians usually suggest starting with 200ml/hour and building this up as tolerated. Aim for 1.5 to 2 litres of fluid a day .

Stage 2: Introducing Purees only – follow this stage for 3 weeks

Eat your meals slowly, taking small mouthfuls and chew your foods very well . Your digestive system might be sensitive to spicy foods so try adding them into your diet slowly and in small amounts.

Your dietitian will provide you with an example meal plan.

Stage 3: Introducing soft & crispy foods – follow this stage for 2-3 weeks

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Orbera Gastric Balloon Diet

Our dietitians will provide very detailed information regarding what is suitable for the bariatric balloon diet. The main difference is that the progression from a very thin liquid diet to pureed and then soft foods is a little quicker. This is because the Orbera placement is a non-surgical procedure and no healing of surgical sites is required for the transition to occur. It is important to remember that the volume of food you will be consuming will be significantly reduced due to the presence of the balloon.

Eating After Gastric Bypass Surgery Recipes

Diet after gastric sleeve surgery

A Gastric bypass diet is a lifestyle adjustment that supports healing, toleration, and healthy weight postgastric bypass surgery. This special diet is constructed to help you adapt to major surgical changes – getting used to feeding a smaller stomach. Its purpose is to also help in your recovery process.*

Are you unsure of what to eat and drink post gastric bypass surgery? Look no further, because this article dishes out all the best recipes and ingredients that will help support a healthy weight. It is important to prioritize protein intake and hydration following gastric bypass surgery.*

Looking for recipe suggestions that are quick, easy, affordable, and geared to your healthy lifestyle? Check out these recipes from our bariatric recipe pantry curated for you by our bariatric dietitian.

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Phase One: Clear Liquid Diet

For 5-7 days after your surgery, you will need to follow a clear liquid diet. The sole purpose of this phase is to allow for healing time and to stay hydrated. The hydration goal should be 64 oz or more, with a minimum of 48 oz to prevent dehydration. For drinks, only take ½-1 ounce of liquid at a time and wait 60 seconds between ounces. A medicine cup is helpful for measuring this out, or you can use the screw cap to a water bottle. Drink very slowly and refrain from gulping.

Duration: This stage will start when you are in the hospital and lasts 5 7 days

Recommended Intake: Clear liquid intake goal is 64 ounces . Minimum of 48 fluid ounces per day. .

Tips: To avoid Acid Reflux, drink 1 fluid ounce at a time, wait 60 secs and proceed to the next fluid ounce.

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