Mini Gastric Bypass

Private Gastric Bypass Surgery in the UK

Mini Gastric Bypass with Allure Weightloss

  • Sustainable Weight Loss

    The average weight loss after a mini gastric bypass is up to 70% of excess weight within the first couple of years.

  • Improve Health Conditions

    A mini gastric bypass often improves obesity related health conditions such as high blood pressure, type 2 diabetes, severe sleep apnea, high cholesterol, and polycystic ovaries. Speak to our team to learn more.

  • Increased Mobility

    Mini gastric bypass surgery leads most patients to be able to do more physical activity, leading to an increase in energy, fitness, strength, and more.

  • Length of Stay

    Typically, patients need one night in the hospital before continuing their recovery at home, but can sometimes require to two or three.

  • Length of Surgery

    The mini gastric bypass takes between 1 to 4 hours to perform.

  • Time Off

    2 weeks off of work is typically required, depending on what you do for a living. Full recovery will take place between 6 and 8 weeks.

What is the Mini Gastric Bypass?

The mini gastric bypass offers similar weight loss to the roux-en-y gastric bypass but is the faster and simpler of the two bariatric procedures.

The mini gastric bypass offers several, significant benefits over a traditional gastric bypass. Weight loss outcomes are marginally better, the bowel is not cut through and reattached, there’s a reduced risk of an internal hernia, and there is only one join between stomach and bowel. Less incisions made means there is less risk and faster recovery overall.

How Does the Mini Gastric Bypass Work?

Much like the roux-en-y, the mini gastric bypass works by restricting the intake of food into the stomach. It achieves this through drastically reducing the size of the available stomach, yet unlike the gastric sleeve nothing is removed. A gastric bypass therefor relies on a series of alterations to the stomach that can be better attributed to ‘plumbing’. 

As well as restricting the physical size of your stomach the psychological size of your appetite will also be impacted due to the reduction in the hunger hormone (ghrelin) produced as a result of the surgery. 

The Mini Gastric Bypass was developed by Dr Robert Rutledge in 1997. 

mini gastric bypass

A Consultant May Recommend the Mini Gastric Bypass if:

  • You have a BMI of at least 35.

  • You’ve already attempted to lose weight via traditional methods such as dieting and lifestyle changes. 

  • You’re willing to have long-term follow-up appointments.

  • You’re willing to adopt a healthy diet and lifestyle.

  • You’re medically fit for surgery and anaesthesia.

The Consultant may recommend gastric sleeve surgery first.

Mini gastric bypass surgery is not recommended for children and young people.

You may be required to pass a psychological assessment first.

Potential alternatives to the mini gastric bypass surgery include:

What Can Mini Gastric Bypass Patients Expect?

Who will be Involved?

  • Specialist Consultant Bariatric Surgeon

  • Our Specialist Dietitian, Chris

  • Our Specialist Bariatric Nurse, Jodi

  • Anaesthetist

Pre Op

You’ll be assessed to check that you’re fit for the operation. This may include blood tests, x-rays, and scans, as well as an explanation of the surgery and long-term outlook. You may need to lose weight and reduce the size of your liver. If your liver is smaller, the operation will be easier and safer.

You shouldn’t eat for several hours before your gastric bypass, but you can continue to drink clear liquids until two hours before. Should you need to stop any medication in preparation for your bypass surgery, your doctor will tell you. You’ll also have plenty of time to ask any questions and discuss your concerns before your surgery.

GMC Registered Bariatric Consultant Surgeons

We only work with the highest-level bariatric consultant surgeons who perform the gastric bypass. They are all leaders in their field. Learn more about our bariatric consultant surgeons by clicking on their images.

Mr Javed Sultan, consultant bariatric surgeon
Mr Javed Sultan, Manchester
Mr Periyathambi Jambulingam
Mr Periyathambi Jambulingam, London
Allure Consultant Mr Brij Madhok
Mr Brij Madhok, Derby

Learn More About the Mini Gastric Bypass

Mini Gastric Bypass Clinics

All of our mini gastric bypass procedures are performed in the highest standard clinics with exceptional patient care. Learn more about our clinics below.

bariatric surgery in manchester, oaklands hospital


Oaklands Private Hospital, 12 Lancaster Road, Salford, M6 8AQ

Spire Bushey Bariatric Surgery and Orbera 12 Month Gastric Balloon Clinic


Heathbourne Road, Bushey
WD23 1RD

Entrance to Derby private health clinic. Light green wall, sign, and two plants.


Uttoxeter New Road
Derby, DE22 3NE

Associated Risks

As with any surgeries, there are risks involved in the gastric bypass procedure. These include excessive bleeding, infection, and blood clots among others. During your initial consultation, the Bariatric Consultant will be able to talk through these risks with you and answer any questions you may have.

Gastric Balloon Consultants Crossing Arms
Zoom call consultation with a Allure Weightloss Doctor

Mini Gastric Bypass Aftercare

We offer a comprehensive aftercare package with all surgical and non-surgical medical weight loss procedures. Our HCPC registered dieticians will help you create a new diet and exercise routine to keep you on top of your weight loss journey. We also offer one to one support from our team of nurses, both before and after your weight loss treatment.

Calculate Your BMI

In order to have a mini gastric bypass you need a BMI of at least 35. If you have a BMI of 35 you may be eligible, depending on whether you have any co-existing medical conditions or concerns. You can use our Calculator in order to determine your BMI, or use the NHS BMI Calculator.

How is body mass index (BMI) measured? 

An individuals BMI is calculated by using the following formula: 

BMI = Weight (kg) / Height (m)²

You must take your weight in kilograms, divide it by your height in meters, and then divide it a second time by your height in order to determine the correct body mass index. 

Not sure you qualify?

If you still aren’t sure, a member of our team will be able to help. If you are certain you won’t qualify for gastric bypass surgery, you still may be eligible for other medical weight loss treatments. 

BMI Calculator

Use this Calculator to Check Your Body Mass Index (BMI).


Please enter a value between 125 and 225.

Please enter a value between 10.0 and 500.0 ( one decimal )

BMI Calculator
Use this Calculator to Check Your Body Mass Index (BMI).
BMI Calculator
Please enter a value between 125 and 225.
Please enter a value between 10.0 and 500.0 ( one decimal )
Please enter value between 4.2 and 7.3
Please enter value between 22.0 and 1000.0 ( one decimal ).
Calculate BMI
Use this calculator to check your body mass index (BMI), which can be useful in determining your eligibility for treatment.

Frequently Asked Questions

What is Dumping Syndrome?

Dumping syndrome is a collection of uncomfortable symptoms, such as feeling sick, weak, faint, sweaty and diarrhoea, caused when sugary foods move from your stomach into the small intestine too quickly.

Avoid drinking and eating at the same time to help prevent dumping syndrome.

What can I eat After Gastric Bypass Surgery?

After surgery, you’ll not be able to eat until your X-ray and swallow test. At first, you’ll have to eat a soft diet and your dietitian will give you a diet plan for the weeks after surgery.

Can I Have Excess Skin Removed?

Surgery can be used to remove this excess skin, although under normal circumstances this is considered to be a cosmetic procedure.

Can I Regain Weight?

Yes. The surgery won’t stop you craving or eating unhealthy food. You must be willing to make long-term lifestyle changes in order to avoid putting weight back on.

Is the Gastric Bypass Permanent?

Gastric bypass surgery is generally non-reversible. There is a risk of you reversing your weight loss if you do not follow the advice provided.

Can I Drink Alcohol?

It’s not recommended that you drink alcohol for the first six months. You will feel the effects of the alcohol faster than before. This is because you will absorb it differently.

Can I Drink Caffeinated Drinks?

It’s okay to drink caffeine after your gastric bypass surgery, but you should avoid drinking too much as it acts as a diuretic and can cause dehydration.

What Medications Should I Avoid?

You should avoid taking a class of medication known as non-steroidal anti-inflammatory drugs (NSAIDs) as these can irritate your stomach and cause stomach ulcers. Common drugs in this category include aspirin, ibuprofen, and naproxen.

How Much Water Can I Drink?

You should try to stay hydrated throughout the day after your gastric bypass surgery. Your dietitian will advise you on what you should be drinking in detail. Please avoid fizzy and sugary drinks.

What Happens if I Don’t get Enough Protein?

As you start to lose weight after your bypass surgery, your body will need more protein to maintain your muscle mass and have a healthy metabolism. If you don’t get enough, your body will start to rely on the protein from your muscles. This will cause them to weaken.

Can Gastric Bypass Surgery Cause Low Iron?

Yes. After your surgery, your stomach may start to digest things differently, including the iron in your foods. You may need to take iron supplements during your recovery to prevent any deficiencies, your doctor will advise you.

Ask About Gastric Bypass Consultations, Cost, and More

Start the process and book your private mini gastric bypass consultation today with Allure Weightloss. Simply speak to a member of our team to discuss the procedure and pathway in more depth. Allure Weightloss is a CQC registered provider of bariatric surgery in England and Wales.