Blog Gastric Bypass

The Complete Gastric Bypass Diet Guide

Desk of Contents

Gastric bypass surgical procedure is a lifesaving procedure. You’ll reduce weight. You will scale back your co-morbidities. You will feel better and look higher. Nevertheless, to achieve success (long-term), you need to change your food plan.

This sounds simple, however it’s not. Be ready for a wrestle. You’ve spent a lot of your life constructing and reinforcing dangerous eating habits. Those have to vary.

Figuring out what you’ll be able to and may’t eat is step one in the direction of a healthy diet. Your weight-reduction plan for the primary 5 weeks after gastric bypass surgery is essential for 2 causes.

  1. Your security. Consuming the fallacious food might put undue strain on your healing stomach.
  2. Resetting your dangerous eating habits and replacing them with new wholesome habits.

Pre-Op Liquid Diet

As a way to scale back the amount of fat around the liver and spleen, a preoperative liquid food plan have to be followed 7-14 days earlier than gastric bypass surgical procedure. If this food plan just isn’t followed, then surgery may be delayed or canceled intra-operatively (in the course of the process).

I can’t stress enough how necessary it’s to comply with the pre-op food plan. You’ve possible waited 6 months to a yr to get authorised and on the operating table. Comply with your pre-op weight-reduction plan.

A big liver prevents your surgeon from visualizing certain anatomy in the course of the procedure. If the liver is just too giant, it then becomes unsafe to carry out your gastric bypass surgical procedure. Surgical procedure might then be canceled and rescheduled to a later date.

The 1-2 week pre-op food regimen will embrace the following parts:

  • Protein shakes or meal alternative shakes would be the weight loss plan’s main element.
  • Only sugar-free beverages are allowed (sugar substitutes are okay).
  • No caffeinated or carbonated drinks are permitted.
  • Soup broth with no strong items of food may be consumed.
  • V8 and vegetable juice are acceptable.
  • Extraordinarily skinny cream of wheat or cream of rice may be eaten.
  • One or two day by day servings of lean meat and/or greens could be okay, however provided that they’re authorised by your surgeon or registered dietician.

All drinks and liquids must be sipped very slowly. Beverages shouldn’t be consumed with meals, and the affected person ought to wait a minimum of 30 minutes after a meal earlier than consuming any sort of liquid.

Separating your liquids and solids applies post-operatively (after surgical procedure) nevertheless it’s an excellent behavior to start out pre-operatively.

A every day meal plan for the patient’s pre-op liquid food regimen might appear to be this:

Pre-operative sample meal plan table.

Excessive Protein Meal Replacements

In the course of the pre-op part (prior to surgery) your physique will go into ketosis. This enables your physique to use your fat stores as an power supply. The result is the fat in your liver shrinks considerably in a short period of time. As seen above, your weight loss plan is high in protein and low in carbohydrates. Under are some advised excessive protein meal replacements:

  • Bariatric Benefit
  • EAS Myoplex Mild/Carb Management
  • Isopure
  • Unjury
  • Chike
  • GNC Complete Lean Shake 25

Notes Pre-Op

Speak to your doctor about stopping sure drugs previous to surgery. The following drugs are sometimes stopped 1 week previous to surgery and should require tapering down the dose.

  • Coumadin
  • Steroids
  • Other anti-coagulation drugs
  • Aspirin, Motrin, Advil, Celebrex, and some other NSAIDs
  • Alternative hormones
  • Contraception

When you’ve got sleep apnea and use a CPAP machine, plan on bringing it to the hospital. Buy nutritional vitamins and dietary supplements prematurely of surgery. Find a good protein shake.

In case you smoke you need to cease previous to surgery. Smoker’s have an elevated danger of blood clots and problems during and after surgical procedure. Make a plan and implement it a number of weeks prior to surgical procedure.

  • Resist the “Last Supper Syndrome.” An empty abdomen is simpler to work with.
  • Don’t eat or drink something on the day of surgical procedure (sometimes, beginning at midnight the night time before).

Submit-Op Dietary Tips

Once gastric bypass surgery is full, a strict post-op eating regimen plan needs to be followed. There’s now a staple line in your stomach that have to be allowed to heal. Sure meals can disrupt the healing course of, put undue stress on the staple line, and lead to a leak.

The food plan for a post-op gastric bypass patient consists of 4 levels:

Table showing 4 stages of gastric bypass diet

Week 1 – Clear Liquids

For 1 to 7 days after gastric bypass surgical procedure, only clear liquids are to be consumed at the fee of one to two ounces per hour. The patient’s dietitian will determine how long this part will last and recommend dietary tips.

Clear liquids really helpful by the dietitian will in all probability embrace the next gadgets:

  • water
  • fat-free milk
  • fat-free broth
  • sugar-free Jello

A stage one clear liquid consumption schedule may appear to be this:

Clear liquid, phase 1 gastric bypass diet schedule.

Throughout this part, it’s essential to remain hydrated. Some surgeons might want you to start out protein shakes a couple of days after surgical procedure. Comply with your surgeon’s tips.

Week Two and Three – Pureed Meals and Protein Shakes

After 1 to 7 days of consuming clear liquids, you’ll be given permission to eat liquefied sources of protein. This stage of the post-op food plan will often final for one week (sometimes 2).

Because of the affected person’s smaller stomach measurement, the individual should have several smaller meals throughout the day. Your day by day intake must be about 60-70 grams of protein (protein shakes, egg whites, pureed meat/fish) and roughly 64 ounces (about 8 glasses) of clear liquids (as outlined in stage one) not counting the fluid within the pureed foods.

Pureed food.Caffeinated and carbonated beverages ought to are not to be consumed. Refined sugars and simple carbohydrates (including sugar alcohol) must be prevented as properly.

Under is an inventory of the pureed protein sources which might be sometimes allowed by the affected person’s dietitian or surgeon:

  • Protein shakes
  • Egg whites
  • Non-fat smooth cheese
  • Non-fat cottage cheese

These food substances ought to be pureed with water, fat-free milk, or fat-free broth. Clear liquids (water) should not be consumed concurrently the pureed meals. As a basic guideline, it’s often recommended that the patient not drink any clear liquid 30 minutes earlier than a meal and 60 minutes after a meal.

Clear liquids must be sipped very slowly, and straws should not be used because they could deliver undesirable air into the stomach.

It’s essential to take one or two multivitamins (containing iron) day-after-day in an effort to forestall nutrient deficiencies. The multivitamins ought to be in chewable or liquid type.

It’s also essential to supplement your food regimen with calcium citrate; the beneficial quantity will often be two or three doses with every dose ranging from 400 mg to 600 mg. Calcium citrate supplementation must be separated from the multivitamin dosages by no less than two hours. It’s because iron and calcium can intrude with each others absorption.

A stage two meal plan may appear to be this:

Stage 2 gastric bypass diet

Week 4 and 5 – Mushy Foods

This stage of the weight loss plan will permit for a very gradual reintroduction of sentimental foods into your food regimen. This stage often lasts about 1 or 2 weeks.

If a food could be easily mashed with a fork, knife, or a spoon, then it is a  candidate for stage three of the post-op gastric bypass food plan. This portion of the food plan will embrace tender meats and cooked vegetables.

The nutrient objectives will stay the same as in stage two. 60-70 grams of protein and 64 ounces of fluid is really helpful day by day. The serving measurement of protein in stage three must be about 1 to 2 ounces and you’ll possible have 3 to six small meals.

Stage three, like stage two, focuses on high-quality lean protein sources. While stage three continues to give attention to high-quality lean protein sources, up to three servings of sentimental greens may additionally be allowed; a tiny portion of fats may additionally be permitted (this small portion of fats will in all probability be from a single serving of ripe avocado).

Suggestions for the protein sources on this stage of the food plan will in all probability embrace several of the following gadgets:

Meat, Dairy, and Eggs

  • lean hen
  • lean turkey
  • fish
  • egg whites
  • non-fat cottage cheese
  • non-fat cheese
  • tofu


  • potatoes
  • carrots
  • green beans
  • tomatoes
  • squash
  • cucumbers
  • bananas
  • avocados

You will nonetheless need two multivitamins and two to 3 400-600 mg doses of calcium citrate (with each of these doses to be taken at the least two hours aside from each other).

Your dietitian might advocate you’re taking 1,000 IU of Vitamin D3 per day; this can almost certainly be divided into two 500 IU doses. These ought to be taken together with your calcium citrate. Additionally, a day by day dose of sublingual B12 (500-1,000 mcg) may be beneficial. A weekly or monthly injection or intranasal choice could also be out there for B12. Some dietitians may want you to start vitamin D3 and B12 supplementation in stage two.

This is what a typical stage three meal plan may seem like:

Phase 3 of gastric bypass diet.

* finely diced and moist / ** boiled or steamed till very delicate / *** have to be ripe enough to be tender / **** mashed

Week 6 – Strong Meals

Strong food is again! You’ve made it this far and it’s time to start out eating actual food. This doesn’t mean you get to eat whatever you want.

Gastric bypass food pyramid.A weight-reduction plan consisting of protein, greens, a restricted amount of grains, and very little, if any, refined sugars must be adopted for the remainder of your life.

Ideas for starting strong foods:

  • Introduce one new meals at a time; ideally not multiple new food a day so you’ll be able to gauge your physique’s response.
  • Eat slowly. Chew your meals properly, 15 seconds each chew. Use the timer on the Baritastic app.
  • Separate your meals and water by no less than 30 minutes.
  • Proceed to drink at the very least 64 ounces of water a day.
  • Eat your protein first, greens second and carbohydrates third (ideally healthy grains and/or fruits, not processed foods).
  • Eat real nutrient dense foods. Keep away from pre-packaged and processed meals with a whole lot of elements.
  • Read labels. Give attention to meals low in carbohydrates and a calorie to protein ratio of 10 to 1 or less (add a zero to the grams of protein and if the full calories are greater than that then you might need to avoid that food – notably in case you are struggling to succeed in your protein objectives).

Dumping syndrome happens when candy and/or fatty foods have been consumed too shortly or in too giant a amount. The stomach dumps the meals into the small gut before it’s properly damaged down. Dumping syndrome often causes nauseousness, cramping, diarrhea, sweating, vomiting, or a rise in heart fee; these symptoms often wear off after one or two hours. However the expertise of ‘dumping’ could be very unpleasant and also you’ll need to avoid it.

To scale back the danger of dumping:

  1. Avoid high sugar/refined carbohydrate foods.
  2. Eat very slowly.
  3. Chew your meals properly.

Certain foods are very troublesome to digest and must be approached with warning:

  • beef
  • pork
  • shellfish
  • grapes
  • nuts
  • entire grains
  • corn
  • beans

Principally, the identical tips present in stage three will probably be carried over into this fourth and remaining stage of the affected person’s post-op dietary plan. The protein consumption, vitamin supplementation, and clear liquid requirements remain the identical.

More vegatables and fruits (both cooked and raw) might now be rigorously added to your eating regimen. Small quantities of fat and really small quantities of sugar might now be added with warning. Carbonated and caffeinated drinks might now be consumed sparsely.

The complete caloric consumption per day will often range from 800 to 1,200 and up to 1,500 18 months after surgical procedure.

A stage 4 meal plan would seem like this:

Phase 4 gastric bypass sample menu.

Bodily Exercise And Train

It’s time to start out exercising. Truly, it is best to have began on stage 2. Walking, operating, biking, weight lifting, aerobics, canoeing, badminton, mountaineering, and dancing in your bed room like a loopy individual can all be added to your weekly routine. Guarantee that you are getting a minimum of 30 minutes of train 5 to 7 days every week. It doesn’t matter how you do it, just do it.

Observe: Do not carry greater than 10 kilos for a minimum of 6 weeks after surgical procedure. This will put undue strain on your inner stitches and end in a hernia.

Choosing Gastric Bypass Applicable Foods

Typically, you’ll need to choose meals which are excessive to average in protein, low in carbohydrates and average in good fats.

Foods with good (wholesome) fats embrace:

  • avocados
  • salmon
  • nuts
  • sardines
  • nut butters
  • coconut oil

Basic tips embrace:

  • Select lean meats.
  • Canned tuna and salmon.
  • Avoid greasy and spicy meals.
  • Avoid entire milk.
  • Eat nutrient dense meals (entire fruits, vegetables, meats, eggs).
  • Plan your meals.
  • Contain your family in healthy consuming selections.
  • Store for wholesome foods.
  • Limit or remove desserts.
  • Don’t tempt yourself with a pantry filled with junk foods.
  • Remove fast meals.
  • Eat out solely once in a while.
  • Take high quality dietary dietary supplements/nutritional vitamins.
  • Separate your water and food by no less than 30 minutes.
  • Introduce new meals slowly.
  • Every meal ought to be no larger than your fist.

Beneficial Articles

Your weight loss plan wants to vary drastically after gastric bypass surgery. You must turn into an skilled on wholesome eating. Keep in mind, the surgery will get the load off nevertheless it’s as much as you to maintain it off.

To calculate your expected weight loss after gastric bypass surgical procedure, use our calculator.


Gastric bypass is likely one of the safest and best forms of weight loss surgical procedure. Because of this, it’s also known as the “gold standard.”

You will drop extra pounds with gastric bypass surgery – on average 70% of your excess weight. Nevertheless, it’s up to you to maintain the load off.

Comply with your surgeon’s food regimen tips, exercise 5 to 7 occasions every week for no less than 30 minutes, and select nutrient-dense non-processed meals. You will hold the load off, scale back drugs, grow to be more healthy, and stay an extended, happier life.

For extra information about gastric bypass surgical procedure, take a look at our Professional’s Guide To Gastric Bypass.