Improved Mini Bypass in Tijuana, Mexico

The Mini Gastric Bypass (MGB), known medically as the one-anastomosis bypass, is a modification of the RNY gastric bypass surgery. It is also called the omega loop because it makes a loop when bypassing the intestines. In 1997, a doctor named Dr. Rutledge from the United States began performing this operation, and over ten years ago, they were approved at Mexico Bariatric Center®.

As a metabolic surgery, up to 90-95% of bypass patients who take medication to control their obesity-related health issue, like insulin, find they no longer need these medications long-term after the operation.

Mini-gastric bypass surgery is proven highly effective in limiting food intake, reducing caloric intake, and altering fat and sugar absorption. Results typically include rapid weight loss as well as noticeable relief from obesity-related health problems like sleep apnea, type II diabetes, hypertension, asthma, and high blood pressure.

Mini Gastric Bypass Surgery in Mexico

Surgery Duration
1.5 – 2 Hours

Hotel Stay
1 Night Pre-Op

Hospital Stay
3 Nights

Back to Work
2 – 3 Weeks

How Mini Bypass Surgery Works

Mini gastric bypass is a restrictive as well as malabsorptive bariatric procedure. The stomach is made smaller to limit and restrict food and calorie intake. Food that enters the new stomach is rerouted to bypass the duodenum and most of the jejunum. Because of this, fewer calories and nutrients are absorbed while still creating digestive juices to break down the food.

There are two components created by this laparoscopic operation with minimal scarring.

The larger section of the stomach split from the “new stomach” remains intact and alive within your body. Although it will not hold food again, it will produce digestive fluid to help the digestion process.

Mini gastric bypass resets your metabolic system for rapid and sustainable weight loss. MGB operation leads to hormonal changes such as Ghrelin (hunger hormone), GLP-1, PYY, and GIP.

Mini Gastric Bypass Patient Testimonial - Marissa Transformation mgb

“Mini bypass with Mexico Bariatric Center on 2/2/18. HW- 287. GW- 175. CW- 158. 5’7″ from a size 24 to a 4!”


Mini Gastric Bypass

Mini Gastric Bypass Weight Loss Timeline

The mini gastric bypass procedure has become popular among bariatric surgeons and patients. It has substantial results in the first few months, equal to RNY gastric bypass, and has proven positive, long-lasting results.

After two years, many MBC’s MGB patients have achieved 85% excess weight loss (EWL). Between the 3rd and 5th year, it is typical for the EWL to level out around 70%-78%. In 14% of patients, there was a failure to lose less than 50% of excess weight within five years.

  • 3 months post-op: 35%-37% excess weight loss*
  • 6 months post-op: 55%-60% excess weight loss*
  • 12 months post-op: 73% excess weight loss*
  • 18 months post-op: 78% excess weight loss*

The numbers expressed here are only average, and it does not indicate that 100% EWL is not achievable.

Why Choose Mexico Bariatric Center for Duodenal Switch Surgery

Why Choose Mexico Bariatric Center?

There are over 40 reasons to choose MBC for your life-changing journey. The 4 main vital factors why patients select MBC are our reputation, reviews, affordability, and safety. Here are a few more,

Starting at $6,195 $5,595*

Mexico Bariatric Center is located just across the border in Tijuana, Mexico. MBC strives to offer the most affordable, quality, and reliable all-inclusive packages to medical tourists around the world.

Mini Gastric Bypass All-Inclusive Package

The cost of mini gastric bypass surgery in the U.S. and Canada without insurance can be a significant financial burden, often ranging from $16,000 to $18,000. Thankfully, we provide top-notch weight loss surgery in Mexico, equal to U.S. standards, but at a much lower price. We handle all the arrangements, from your arrival in San Diego until your departure. Our all-inclusive package covers everything – ground transportation, hotel accommodations, and all other essentials. Experience seamless weight loss surgery with our mini gastric bypass Mexico package starting at just $5,595*.

  • Private Ground Transportation
  • Accredited Hospital with ICU
  • Board Certified Surgeons
  • Hospital Stay & Fees (3 nights)

  • Nutrition Program
  • 1-Month Supply of Vitamins*
  • Online Support Group

  • U.S. Surgeon Liaison

  • No Hidden Fees

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Mini Gastric Bypass Before and After Photos

Dan Mini Gastric Bypass Before
Dan Mini Gastric Bypass After
Andrea Before Face -Mexico Bariatric Center
Andrea Afer Face to Face -Mexico Bariatric Center
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Sarah Beers After
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Kayla P After
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Carlos C After
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Kelly C After Mini Gastric Bypass_Mexico Bariatric Center
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Martin V after Mini Gastric Bypass_Mexico Bariatric Center
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Katarina before mini gastric bypass
Katarina after mini gastric bypass
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Paige after mini gastric bypass
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kayla after
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Claudia mini after
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Jake mini after
Renee mini RNY before
Renee mini after
Andi Before
Andi After
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Andrea mini after
Marissa Before
Marissa After
Linsey Before - Mini Bypass
Lindsey After - Mini Bypass

Do I Qualify for Mini Gastric Bypass?

The Mini Gastric Bypass is a robust weight loss procedure similar to the gastric bypass. This weight loss surgery is quickly growing in popularity as one of the safest and most effective forms of bariatric surgery. To qualify for mini bypass in Mexico, you must have a body mass index (BMI) 30+.

Use our BMI calculator to instantly determine if you’re a candidate for mini gastric bypass surgery in Mexico. Our general requirements for procedures:

  • BMI of 35+

  • Ages between 16 and 65 (case by case basis)
  • Realistic expectations regarding the weight loss results

Calculate Your BMI

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  • Tanya Mini Gastric Bypass Surgery Before and After
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  • Grace-Mini-Gastric-Bypass-Surgery-Before-and-After-720x720
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  • Hannah Mini Gastric Bypass Surgery Before and After
  • Mariessa before and after mini gastric bypass in mexico
  • Tellha-Mini-Gastric-Bypass-Surgery-Before-and-After
  • Kaylee-Mini-Gastric-Bypass-Surgery-Before-and-After

Is Mini Gastric Bypass Safe?

The mini gastric bypass only reroutes a single anastomosis (connection) of the small intestine instead of the standard double anastomosis found in gastric bypass and duodenal switch. In the Roux-en-Y, the second connection is made to bring stomach enzymes, bile, and pancreatic juice to the Y.

Instead of having two potential leak areas or bleeding; the mini bypass just has one. This makes it safer, reduces operating time, and lowers complication rates compared to standard bypass surgery.

One of the significant concerns of medical patients traveling to Mexico for weight loss surgery is the surgeon’s qualifications. Mexico Bariatric Center works with exclusive surgeons who have performed hundreds of MGB and are capped to a maximum of 3-4 surgeries per day for the safety of patients.

Pros and Cons of Mini Gastric Bypass Surgery

A study by the Department of Surgery at the Heart of Florida Regional Medical Center followed a group of mini gastric bypass patients starting with an average BMI of 46. In 91 percent of patients, diabetes had resolved itself within one year. Experts concluded that MGB improves GERD, and fewer ulcers occurred compared to those after RYGB.

Mexico Bariatric Center® can help save you thousands of dollars on all-inclusive packages for mini gastric bypass surgery in Tijuana, Mexico.

Advantages of Mini Gastric Bypass Surgery

  • Safe, highly recommended surgery
  • Faster recovery time compared to gastric bypass and duodenal switch
  • High success rate and significant weight loss
  • Strongly requested by past patients
  • One of the most effective surgeries to revise and rescue previous bariatric procedures
  • Useful in resolving Gastro-Esophageal Reflux Disease or GERD
  • Health Advantages can improve asthma/breathing Issues, Type II Diabetes, Sleep Apnea, Arthritis, Headaches and Migraines, High Cholesterol and Blood Pressure, Infertility and PCOS Syndrome, Gastro-Esophageal Reflux Disease or GERD, Cardiovascular Disease, Back Pain and Joint Pain

Disadvantages of Mini Gastric Bypass Surgery

  • Minor Side Effects: Gas Pain, Bruising, Nausea, and Inflammation, short-term hair loss
  • Severe Side Effects: GERD/Gastritis, Bile Reflux, Pneumonia, Blood Clots, and Gallstones
  • Possible short-term complications: Bleeding and Leak (rate of 1.06%[4])

  • Possible near-term complications: Stomach Obstruction, Stricture, or Abdominal Abscess

  • Possible long-term complications: Delayed Leak

Surgical Steps of the Premium Mini Gastric Bypass

The surgeon inserts an endoscopic cutter/stapler through the trocars to split the stomach into two sections. The smaller section becomes your “new stomach.” It stays connected to your esophagus, and the surgeon reshapes it into a narrow tube, similar to the shape of a vertical sleeve gastrectomy. The new mini bypass stomach will hold between four to six ounces of food, compared to the old stomach which holds 40 ounces of food.

The lesser curvature is defined where the body and the antrum meet and the stapler division is created at a right angle from this lesser curvature, and then upwards parallel to it.

The surgeon divides the stomach laterally toward the gastroesophageal junction. This digestive fluid travels through the small intestine, connecting to the point at which food is digested through the “new stomach,” breaking down the food as it continues through the intestine. Then, the bariatric surgeon will examine the length of your small intestine to measure the amount that will be bypassed. This section of the small intestine will include both the duodenum and a section of the jejunum. It generally is bypassed 5-6 feet from where the larger stomach, or “old stomach,” connects to the small intestine.

When creating the 200 cm long malabsorptive jejunal bypass, the surgeon turns their attention to the left gutter, retracting the omentum medially so that they may identify the Treitz ligament. They run the bowel 200 cm distal to this ligament, at which point the gastric sleeve’s distal tip is anastomosed anti-colic to the jejunum end side. Your surgeon will determine the bypass length based on lifestyle, habits, health, and physical condition. Finally, the surgeon begins the connection between the “new mini stomach” and the bypassed small intestine, using a stapler. This connection point is called an anastomosis. Once finished, the mini gastric bypass surgeon will reinforce and stabilize the anastomosis with sutures, completing the procedure with sutures on the trocar insertion parts of your abdomen.

Anesthisia Icon

1. Anesthesia Administered

General anesthesia is administered by the anesthesiologist and a breathing tube (endotracheal tube) is inserted into the esophagus.

Laparoscopic Incisions Minimal Invasive Icon

2. Cut 3-5 Laparoscopic Incisions

Surgeon makes 3 to 5 laparoscopic incisions in the abdomen and trocars (hollow steel tubes) are placed through as a passageway for surgical instruments.

Trocars Gastric Sleeve Icon

3. Abdomen Filled and Liver Lifted

The abdomen is filled with CO2 to separate stomach wall from the small intestine. The liver is gently pushed aside with a retractor by the assistant surgeon.

Reinforced Gastric Sleeve Staple Suture Icon

4. Divide Stomach to Form Pouch

Insert cutter/stapler as well as other instruments through the trocars. Split the stomach into two sections laterally toward the gastroesophageal junction. The smaller section becomes your “new stomach.”

Mini Gastric Bypass Icon Loop Intestine

5. Loop Bypass Small Bowel

Measure small intestines to become a bypass point (200 cm or longer). The bypassed section of the small intestines connects to the new stomach. This connection point is called an “anastomosis.”

gastric sleeve drain inserted icon

6. Reinforce & Insert Drain

The anastomosis staple-line is reinforced with brand-name sutures, Johnson & Johnson or Covidien to control bleeding, stomach leakage, and stretching. A drain is inserted as a precaution for the early detection of a leak until the patient is released.

How Does Mini Gastric Bypass Compare?

Comparison to Gastric Sleeve – The one-anastomosis gastric bypass (OAGB) reduces the stomach size significantly while bypassing a large part of the small intestines. The gastric sleeve procedure, however,  completely removes 80% of the stomach, instead of keeping it in-place like the mini gastric bypass.

Comparison to Gastric Bypass – Gastric Mini Bypass is a modified version of Gastric Bypass working in similar ways. The Roux-en-Y Gastric Bypass (RYGB) has two anastomoses, while the mini gastric bypass only has one. The “new stomach” in mini-bypass is created along the lesser curvature of the patient’s stomach. The mini-gastric bypass is also less likely to stretch. The mini-gastric bypass has higher rates of marginal ulceration (MU) as ulcers may occur after this operation.

A surgeon from Taiwan, Wei-Jei Lee, made a comparison between RYGB and the MGB after performing over ten years of the surgeries. He believed that MGB was safer and simpler and that it produced better results when it came to diabetes reduction, GLP-1 elevation, and long-term weight loss.

Is Mini RNY Surgery Dangerous?


The number of OAGB procedures performed has increased dramatically worldwide since it was conceived in the United States 18 years ago by a well-known doctor named Robert Rutledge. In the early stages of the mini gastric bypass surgery, there was a lot of resistance from the medical community, which had been performing more prolonged procedures with incredible difficulty. The surgeons find this procedure to be technically straightforward, rapid, efficient, and safe. There has been a 0.2% 30-day mortality rate.

Even though MGB has been recognized as a simple procedure, the operation can lead to severe complications in the hands of doctors with insufficient understanding of the underlying anatomy and physiology.

The process also offers a single anti-colic anastomosis that results in less leakage in the prevailing view. The absence of any leaking issues and a bypassed length can be modified based on the patient’s BMI. This procedure results in durable weight loss that can be reversed or revised as needed.

Digestion Process Changes in MGB

The Normal Digestion Process – In the typical process of digestion, food begins in your mouth, goes down through the esophagus, then reaches your stomach. As the food gathers in your stomach, it combines with acids and enzymes that aid in digestion. The gallbladder (holds bile produced by the liver) and the pancreas also create and release digestive juices to help aid in digestion, which connects to the small intestines through the pylorus.

As food breaks down, the particles get released into the first part of the small intestine (duodenum) and continue to the second part of the small intestine (jejunum). Almost all the calories, nutrients, and important enzymes are absorbed within the duodenum and jejunum while most of the leftover particles go through the digestive tract and get wasted.

The New Digestion Process – After the mini gastric bypass surgery, the new stomach will hold significantly less food which creates the feeling of being full. Next, as the food exits the new stomach, it reroutes so it does not go through the duodenum and avoids most of the jejunum. Because of this, fewer calories and nutrients are absorbed, while also having most of the same digestive fluid break down the food particles.

Technique Modification

MGB is a modification of the original Billroth II procedure. The surgeon will determine the bypass length based on lifestyle, habits, health, and physical condition. In people who are very tall or especially obese, the surgeon may opt for 250 cm or more rather than the traditional 200 cm distal to the Treitz ligament.

Different modifications of this surgery have had different results, and it was found that placing the anastomosis between 200 cm and 300 cm proximal to the body’s ileocecal valve would be ideal for maintaining an adequate level of nutrition.

The MGB operation can be modified if there is inadequate or excess weight loss. This involves moving the anastomosis either proximally or distally.

* Prices are subject to change. Not valid on certain dates (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. Individual results will vary; there is no guarantee stated or implied.

Last Updated: Dec 2023, by Ron Elli, Ph.D.

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