Weight Loss Surgery Options [Comparison Table]: Full Patient’s Guide

Dieting and exercise are likely to fail many people who attempt them in hopes of losing weight. Here we will compare all effective weight loss surgery options for patients to choose the best procedure for them.

The body sees a calorie reduction diet (Calories In less than Calories Out) as a starvation threat. And body’s natural resistance to weight loss can be described as the increased feelings of cravings and hunger while simultaneously decreasing the metabolism and satiety.  These two mechanisms will keep most individuals from losing any considerable weight. This is most aptly explained by the body’s metabolic thermostat, i.e. ‘Set Point Theory.’ Body fat setpoint is affected by Genetic Predisposition, Environmental Exposure, and Developmental History.

Even after you succeed to lose the weight, your body will typically try to go back to your previous ‘set point,’  meaning the body may encourage excess weight to regain. As if your body will remember the initial ‘set point.’ This could cause a vicious cycle and it is known as weight cycling or yo-yo diet.

There are a lot of options to lose weight via surgery because there isn’t one bariatric surgery that is ideal for everyone. Each patient has their characteristics that will dictate which surgery is best for them.

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Types of Bariatric Surgeries

Surgical treatment of obesity or bariatric surgery is a proven solution to fight obesity by shifting the neurohormonal axis to renew the patient’s life. Bariatrics can cure numerous medical diseases including diabetes, hypertension, high cholesterol, sleep apnea, liver disease, and arthritis among others. Obesity surgery works so well because it changes the physiology and creates a new ‘set point,’ in patients. Causing them to keep the weight off for the long-term.

Weight loss surgeries can be classified into three broad categories, depended on their primary method of action. In other words, the way the operation achieves weight loss. Currently, there are three types of bariatric procedures; restrictivemalabsorptive and a combination of restrictive & malabsorptive.


Restrictive bariatric procedures are procedures which ‘restrict’ the stomach’s capacity, thereby reducing caloric intake. The smaller stomach capacity will induce the feeling of fullness quicker than normal, prompting the patients to eat less, while still being satisfied. This method is seen in procedures such as adjustable gastric banding, vertical sleeve gastrectomy (gastric sleeve), and intragastric balloon.


Malabsorptive bariatric procedures reroute, rearrange or remove part of the digestive system to reduce the body’s absorption of calories from food. Malabsorptive produces more weight loss (typically), then restrictive, but also produces higher unwanted complications and side effects. There are no stand-alone malabsorptive procedures currently being performed today, they’ve all graduated to a combination of restrictive and malabsorptive.


Combination bariatric procedures provide individuals the best chance to reduce morbid obesity. Combination procedures use both techniques (restrictive and malabsorptive) to produce high amounts of ‘excess weight loss’ (amount of weight, determined to be in excess). Some bariatric surgeons describe combination and malabsorptive the same. Current combination surgeries still in operation are gastric bypass and duodenal switch.

Open vs. Laparoscopic vs. Single Incision vs. Endoscopic

In the past, bariatric procedures were performed openly. Now, most bariatric surgeries are performed laparoscopically with excellent results. Qualified bariatric surgeons are very experienced with laparoscopic surgery, producing surgeries with lower recovery time, lower surgical complications, and aesthetically pleasing results.

Open Bariatric Surgery

Open Bariatric SurgeryOpen surgery was done without any medical technologies, meaning there would be a large incision in the abdomen for the entire surgery to perform. Now, open surgeries are rarely performed, due to longer recovery periods and higher risks of infection and adhesions.

Open surgery requires patients to recovery in the hospital longer than laparoscopy and has less cosmetic scarring than laparoscopic surgery.

Laparoscopic Surgery

Laparoscopic Bariatric SurgeryLaparoscopic surgery is performed with medical instruments that have built-in cameras allowing surgeons to view the abdomen on nearby screens. The result is that there are five to six small incisions, rather than one large incision in the abdomen with open surgery.

Laparoscopic requires less recovery time in the hospital, typically two or three days and has more cosmetic appearance post-surgery.

Single Incision Surgery

Single Incision Bariatric SurgerySingle Incision bariatric surgery allows patients to undergo bariatric surgery with fewer scars. This allows patients to heal more aesthetically while speeding up the healing time.

Single Incision bariatric surgery is only available on more simplistic surgeries such as the gastric sleeve surgery. Learn more about single incision weight-loss surgery.

Endoscopic Surgery

Endoscopic Bariatric SurgeryThe endoscopic procedure utilizes an endoscope, a flexible medical instrument inserted through the mouth, rather than making an incision in a traditional surgery. In newer, experimental procedures such as such as Endoscopic Sleeve Gastroplasty, the endoscope is used to place sutures in the stomach and making it smaller. In addition, most patients will require endoscopy before revisional weight loss surgery.

Stomach Banding vs. Stomach Stapling

Many individuals may conflate stomach surgery and stomach stapling as both are bariatric (weight loss) surgery. Both are essential components in weight loss surgery, but are different, and thus, necessary to distinguish.

Stomach Banding

Stomach banding is the colloquial term for the vertical banded gastroplasty and gastric banding, which are the same restrictive procedure as Lap-Band surgery. Stomach banding procedure relies on a medical device to wrap around and ‘band’ the stomach, thereby causing restriction. This is typically a stand-alone procedure but has been utilized previously by surgeons in other surgery types.

Stomach Stapling

Stomach stapling, is the colloquial term to describe a few weight loss surgeries, including gastric sleeve surgery (vertical sleeve), roux-en-y gastric bypass, duodenal switch. This type uses medical staples to recreate permanently and close a smaller stomach for individuals. This requires just one surgery and may result in more predictable weight loss.

Current Weight Loss Surgery Options

Below are the five primary weight loss surgery options that are typically accepted and practiced by bariatric surgeons in the United States, Canada, Mexico, and Europe. In other countries, especially countries in Europe, are quicker to approve more experimental procedures.

Type of Surgery

Gastric Sleeve

Gastric Bypass

Mini Bypass


Duodenal Switch

Procedure Diagram

Gastric Sleeve SurgeryGastric Bypass Surgery Schematic - Sleeve vs BypassMini Gastric Bypass Surgery Schematic - How it Works - Mini Bypass in MexicoLap Band - Adjustable Gastric BandDuodenal Switch Surgery Schematic

Method of Weight Loss

The gastric sleeve procedure is a restrictive weight loss procedure. This means it reduces the size of the stomach, therefore reducing food intake and calorie intake. It originally holds 1 ounce of food, expanding to 3 ounces over timeThe RNY gastric bypass procedure is restrictive and malabsorptive. It is restrictive because it reduces the size of the stomach, but it also reduces calories absorbed by the body by changing digestion.The mini gastric bypass alters the digestion and creates a smaller pocket of the stomach, making it a restrictive and malabsorptive procedure. Weight loss is achieved through the smaller stomach pouch and by reducing calorie.Gastric banding is done by reducing the size of the stomach with an implant. As a restrictive procedure, there is a band placed around the upper part of the stomach to make a small pouch out of the stomach itselfAs a restrictive and malabsorptive weight loss procedure, the duodenal switch creates a new and lower stomach as well as changing digestion of food and calories. As a restrictive and malabsorptive weight loss procedure.

Stomach Alterations

Stomach size reduced. The stomach is reduced permanently by removing 75 to 80 percent of the stomach.New Stomach is Created: Stoma. For food to bypass the stomach, a smaller pouch called a stoma is created by using the body’s intestines.A new stomach called a stoma is created during the mini gastric bypass procedure. Food is then bypassing the stomach and going directly to the smaller pouch.Stomach size reduced. With the gastric band implant, the stomach size is reduced. It can be removed or adjusted as needed.The duodenal switch is an irreversible procedure that makes a permanent stomach alteration. About 75 percent of the stomach is removed, leaving behind a significantly smaller portion of the stomach.

Changes to Intestines

There are no changes to the intestines during this surgical procedure.The intestines are cut and bypassed during the RNY gastric bypass procedures. This allows it to be malabsorptive of calories and nutrients as well.The small intestines are cut and bypassed with the mini gastric bypass procedure.There are no changes to the intestine.In the duodenal switch, the intestines are switched to lower food absorption. This is done by creating a new stomach and switching with the last several feet of the small intestine.

Operating Time

1 to 2 hours2 hours2 hours1 to 2 hours3 to 4 hours

Average Hospital Stay

2 days2 to 3 days2 to 3 days1 day2 to 3 days

Time Off Work

2 weeks2 to 3 weeks2 to 3 weeks1 week3 weeks

Recovery Time

The average recovery time following a gastric sleeve procedure is 3 weeks. This is a laparoscopic procedure with a short recovery time. You may need pain medication to help get you through the recovery period though you will have a small amount of discomfort compared to other weight loss surgery procedures.The average recovery time for RNY gastric bypass is typically six to eight weeks. You are not able to drive on your own for at least 10 days and are instructed to follow all post-op instructions, including taking medications and not returning to normal activities until directed by a doctor.On average, recovery takes a six to eight weeks. You are released from the hospital in just a couple days, but you will need a few months before you can return to all of your normal activities following the procedure.The gastric banding procedure is minimally invasive and has a short recovery time of 4-6 weeks.Recovery time for the duodenal switch is about six to eight weeks, though this varies based on the person. It is laparoscopic so only small incisions are made, but the inside takes longer to heal.


The gastric sleeve procedure does not change your stomach, thus preventing dumping syndrome. This is a quick and minimally-invasive procedure with a short recovery time. The risks and complications you have after surgery are also minimal.The RNY gastric bypass has the benefit of a high amount of weight loss. It also helps with other medical conditions, including diabetes, hypertension, osteoarthritis and sleep apnea.There is a very large amount of weight loss with the mini gastric bypass, making it one of the top benefits. It also has very few incisions and is done as minimally invasive as possible. This is a safer and shorter procedure than the traditional gastric bypass.The advantages of the gastric banding procedure include being a reversible process and a simple and quick procedure to complete. It is also adjustable, which helps you lose weight over an extended period. This fact that it is adjustable also contributes to reducing risks and complications.There is a very high level of weight loss, with the average patient losing up to 80 percent of their excess body weight. The majority of this weight is lost within the first year after the surgery.


There tend to be fewer people who lose a large amount of weight after gastric sleeve surgery and the stomach may expand over time causing weight gain. The procedure is not reversible, so certain complications cannot be helped.Some disadvantages of the RNY gastric bypass include leakage and vomiting, dumping syndrome and bleeding following the surgery. There is also a higher risk of ulcers in the stomach following the procedure.Risks and complications include dumping syndrome, bleeding, vomiting, and leakage. Higher risk of ulcers in the stomach.Among all the weight loss procedures, there is less weight loss with the gastric banding procedure. The band can loosen over time and cause you to eat more and then gain weight. However, it can be adjusted to prevent this from happening. Because of this, expect more visits to the doctor. The risks and complications are slightly higher than other procedures.The main disadvantage of the duodenal switch is that it is not reversible. It has the same risks and complications of any other type of surgical procedure, and you may experience more bowel movements.

Surgery Description

The gastric sleeve procedure is done by removing part of the stomach and making a tube-shaped sleeve where the food will then be digested. This reduces how much is eaten during each meal, resulting in weight loss. This is a laparoscopic procedure, with very minimal incisions used.A small stomach pouch attached to the small intestine is created during the RNY gastric bypass procedure. This allows all food to bypass the stomach and go directly to the small pouch, which reduces how much food can be absorbed during each meal. It is preferred for patients with heartburn.Mini gastric bypass is done by creating a small pouch using a laparoscopic stapler for the stomach. The majority of the stomach isn’t attached to the esophagus, and food bypasses the larger part of the stomach after the procedure.Gastric banding is done by placing an implanted silicone ring around the upper part of the stomach. This separates the stomach with a smaller pouch on top where the food goes, avoiding the larger part of the stomach.A vertical pouch is made similar gastric sleeve during the duodenal switch, which is attached to the final 6 feet of the small intestine.

Realistic Expectations

60% to 70% EWL. Patients lose an average of 60 to 70 percent of their excess weight in 1-2 years following surgery.70% to 80% EWL. On average, patients lose between 77 percent and 80 percent of their excess body weight in the first 2 years after the surgery.70% to 80% EWL. Within the first year after surgery, patients can lose up to 70 percent of their excess body weight.40% to 50% EWL. Patients have been known to lose around 50 percent of their excess body weight and keep it off in the long-term.75% to 85% EWL. Patients lose an average of 50 percent to 85 percent of their excess body weight in the first year, keeping it off for three years or longer.

Success Rate

85% to 95%. The majority of patients have kept the weight off. Up to 90 percent of patients that had success with the surgery.80% to 90%. The majority of patients have kept the weight off. Up to 85 percent of patients that had success with the surgery.85% to 90%. The majority of patients have kept the weight off. Up to 90 percent of patients that had success with the surgery.40% to 50%. Difficult procedure to manage weight loss (requires diet & exercise) with complications and failure rate > 50%85% to 95%. Up to 95 percent of patients that had success with the surgery. It is possible to lose too much weight after the surgery.

Post Surgery Dietary Info

After surgery, patients are instructed to follow a phase diet. It has four stages, beginning with clear liquids, followed by full liquids, soft foods, and then regular foods. Calcium supplements, vitamin B12, and multivitamins are recommended.After surgery, it is important to drink enough water for staying hydrated, taking recommended vitamins and minerals, and eating enough protein. You are advised to eat three small meals a day and avoid high-fat food as they lead to dumping syndrome. Eat and drink slowly, do not drink through a straw, and do not drink during meals. Take vitamin B12, zinc and iron.Take calcium, vitamin B12, iron, and a multivitamin to avoid vitamin deficiency. Eat three small meals a day that is low in fat and sugar. Start slowly with a liquid diet.Follow a liquid diet for three weeks then slowly add in solid foods. Eat 3 small meals a day aiming for no more than 1,000 healthy calories a day.Eat pureed food frequently throughout the day for 2 weeks, then switch to solid foods every 2-3 hours. Take all the required vitamins and supplements, including a protein supplement.

Candidate Efficacy

Patients who are obese or in the high-risk category according to their BMI make great candidates for the procedure.Patients with a BMI of 35-55 are suitable candidates for RNY gastric bypass.Patients that have a BMI of 35-55 can get the mini gastric bypass.Gastric banding is most useful for patients that are more disciplined in following a strict diet and will commit to an exercise program. Suitable candidates are committed to weight loss.The Duodenal Switch has a higher incidence of complications than any other weight loss surgery. Patients with a BMI of 50 or more can get the duodenal switch.

* Success is normally realized by losing 50% of excess weight (EWL) and it depends on the type of surgery, BMI before surgery, surgeon competency, and post-surgery diet & exercise.

Compare two Procedures Side-by-Side for Easier Analysis

Outdated (No Longer Recommended) Bariatric Surgery Procedures – History of Obesity Surgery

Procedures like Jejunoileal Bypass was performed in late 1960’s after surgeons learned that patients who had lost a portion of their small intestine would lose weight. Many old surgeries such as Jejunocolic Bypass, Jejunoileal Bypass, and Vertical Banded Gastroplasty are no longer performed due to their high complication rates and a slew of health problems including fatality.

Jejunoileal Bypass

Jejunoileal Bypass (JIB)

The Jejunoileal Bypass is one of the first surgeries designed for morbidly obese patients to lose weight from the 1950s through the 1970s. Two variations of JIB were practiced, the ES (end-to-side) and EE (end-to-end) anastomoses of the proximal of jejunum to the ileum. The Jejunoileal Bypass, was the purely malabsorptive procedure (rare), is a surgery that bypasses most of the intestine. Although weight loss was enough, it caused severe complications due to permanent malabsorption. Patients would encounter diarrhea, night blindness, osteoporosis, liver disease and liver failure. Other serious issues, like fat-soluble vitamin deficiencies, malnutrition and death can occur in patients with JIB.

Overall, the JIB is no longer being performed or recommended as it needs frequent hard-to-do revision surgery. This procedure and Jejunocolic Bypass were a stepping stone to future procedures.

Vertical Band Gastroplasty Schematic

Vertical Banded Gastroplasty (VBG)

Vertical Banded Gastroplasty (VBG) was devised in between 1970 and 1980 by Dr. Edward Mason (known as the ‘father of obesity surgery’ and the American Society for Metabolic and Bariatric Surgery) for weight control. This procedure was performed as a restrictive or combination of restrictive and malabsorptive surgery, also known as ‘stomach stapling.’ VBG was designed to be a safer alternative to RYGBP and the JIB. In this procedure, a gastric band and staples are utilized to create a small stomach pouch to restrict the amount food content traveling down to gastrointestinal tract. Ultimately, VBG is no longer being recommended with better options including Gastric Sleeve and RNY Gastric Bypass.

More Info: Vertical Banded Gastroplasty

Experimental & New Weight Loss Procedures, Tools

Below are various experimental procedures that either upcoming FDA approval, experimental or approved in another country other than the United States.



  • EndoBarrier Gastrointestinal Liner (on hold due to safety concerns)

Other Latest Bariatric Procedures Today Are (Not Offered at MBC)


FDA approves the new device, Vagal Blocking, to curb hunger. Through the leads placed around the trunk of the vagus nerve, the pacemaker-like device sends intermittent electrical pulses. The pulses sent along the vagus nerve reduces hunger and increases feelings of fullness. This is a safe and reversible procedure that is performed minimally invasive.

The company reports 28% excess weight loss over a period of one year for 12 hours of a day. Serious Adverse Events (SAE) related to this procedure includes neuro-regulator malfunction, pain at the neuro-regulator site, vomiting, collapsed lung and gallbladder disease.

Aspire Assist

  • AspireAssist

AspireAssist is an aspiration therapy system approved by FDA that helps remove about 30% of the ingested food from the stomach before the food enters the small intestine. It is made up of A-tube inserted into the stomach (endoscopically) connected to the reservoir and the drain tube.

Emptying the food after you eat and is ingested from the stomach into the toilet can be gross to some patients. read more

Non-Bariatric Surgery Procedures

Mexico Bariatric Center offers Hiatal Hernia Repair, Para-Esophageal Hernia (PEH) Repair, Cholecystectomy (gallbladder removal), and Plastic Surgery in Mexico.

History of Bariatric Surgery

In 1950, the medical industry brought bariatric surgery into the market, with Intestinal Bypass. Intestinal bypass, known as Jejunoileal Bypass (JIB), was the first type of bariatric surgery where a large part of the intestine is bypassed, while the stomach stays intact. This lead to the Open Gastric Bypass in 1966, which is similar to the laparoscopic gastric bypass but instead the entire abdominal cavity is cut open for better access for surgeons. In 1970, the Open Gastroplasty was invented, splitting the stomach into two sections. 10 years later, in 1980, the open gastroplasty led to the Vertical Banded Gastroplasty. In 1978, the Gastric Band, or LAP-BAND, was created. This procedure places a band around the stomach to reduce its size. Less than a decade later, the Duodenal Switch (DS) began, where the stomach size is reduced while the small intestines are bypassed. In 1994 the Laparoscopic Gastric Bypass started as surgeons gained more experience with the open gastric bypass. This procedure is one of the most popular bariatric surgeries today. The Open Gastric Sleeve, or Sleeve Gastrectomy, was created in 1997. This procedure removes up to 80% of the stomach. 3 years later in 2000, the open gastric sleeve became the Laparoscopic Gastric Sleeve, needing only 5 incisions to complete the procedure. In 2001 the LAP-BAND, or Gastric Banding, became FDA approved in the United States. Recently in 2015, The Gastric Balloon also became FDA approved in the U.S.

Complete History of Bariatric Surgery Timeline Infographic


Last revised by Ron Elli, Ph.D. on 02/15/2018

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For additional questions please don’t hesitate to contact us using the below contact form, and we will get back to you as soon as possible.

* Prices are subject to change. Not valid on blackout dates. Prices depend on the surgeon, surgery, additional fees, and schedule. Prices may rise because of BMI level and previous abdominal surgeries.

** All of the testimonials are covered in our disclaimers. Individuals results will vary; there is no guarantee stated nor implied.

Last Updated: September 6, 2018 by Ron Elli, Ph.D.

Reviewed by Dr. Kimberly Langdon, M.D. August 2018