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Gastric bypass weight loss surgery

We’re the UK’s most trusted weight loss & cosmetic surgery provider

Meet your new weight loss partner

Gastric bypass surgery is a life-changing procedure that could help you lose weight, improve your health, and transform your entire lifestyle.

Losing weight on your own can be extremely difficult, and gastric bypass surgery is proven to be a highly effective weight loss procedure when combined with diet, exercise, and general lifestyle changes. A gastric bypass operation could help you lose an average of 55-70% of excess weight after three years, according to the

Gastric bypass surgery involves removing or stapling some of the stomach and re-routing the small intestine. This assists weight loss by restricting food intake, reducing hunger and reducing the absorption of calories and nutrients. A general anaesthetic is required for gastric bypass surgery and, depending on your medical condition and individual needs, the procedure can take 2-3 hours.

Our experienced patient advisors and highly qualified surgeons will explain the procedure and help you decide whether it’s the right route for you and your weight loss goals. Get in touch with us today by calling 0121 445 7549, emailing [email protected] or booking your free consultation to learn more about gastric bypass surgery.

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Patient stories

“I first started to think about having a gastric bypass about 3 years ago. With all the health problems I was experiencing it really got me motivated to do something about my weight. A close …

Steven Pridmore

Gastric bypass

Gastric bypass results

See the weight loss success our patients have experienced through gastric bypass surgery:

Steven Pridmore

Gastric bypass

Olivia Coates

Gastric band conversion to gastric bypass

Why choose The Hospital Group for gastric bypass surgery?

The Hospital Group is the largest and most trusted UK provider of weight loss and cosmetic surgery, with more than 25 years of experience. We provide surgical excellence to our patients who put their trust in our care. Here are some of the reasons why you should choose us for your gastric bypass:

  • Highly experience surgeons:When you’re putting your trust in a weight loss surgeon, only the most experienced will do. At The Hospital Group, we only select General Medical Council registered surgeons to work with us, and all of our team have a huge amount of experience and expertise.
  • World-class facilities:We have two of our own state-of-the-art private hospitals and a network of 20 clinics across the UK that’s constantly expanding. All our facilities offer exceptional standards of patient care and are Care Quality Commission registered.
  • Experienced team of dietitians:Our team of dietitians have years of experience in helping patients ensure they are meeting all their nutritional requirements following bariatric surgery, and achieving their goals safely and healthily.
  • Dedicated weight loss support team:Whether you need to book an appointment with a nurse, a dietitian, your surgeon, or you just have a general question following your lap band weight loss surgery, we’re here to support you every step of your journey.
  • Full weight loss journey aftercare:You can choose from a range of comprehensive weight loss aftercare packages, offering from one year to six years of cover. Rest assured that we’re here for you throughout your weight loss journey, with ongoing support from our specialist nurses and dietitians.

What is the difference between a gastric band and a gastric bypass?

Both the gastric band and gastric bypass are forms of bariatric surgery, which can help you lose weight over time. However, they’re different types of surgery and so can have different results.

  • What is a gastric band?

A gastric band is a hollow tyre-like silicone device which is wrapped around the very top of the stomach. Here, it stimulates nerve endings in the stomach wall to help you feel less hungry. The band also slows you down when eating, requiring you to take smaller mouthfuls and chew more thoroughly. This helps you to realise when you’ve had enough to eat.

Gastric bands are reversible, and do not remove any part of your stomach. You also will be able to absorb vitamins and minerals naturally after a year and won’t necessarily need to follow a supplement routine for life. The only supplement needed then is an off-the-shelf multivitamin and mineral set, which helps to offset the fact that you will only be eating small portions.

Some drawbacks of the gastric band are that the balloon can move and require additional surgery. Weight loss results can also vary more than other forms of bariatric surgery.

  • What is a gastric bypass surgery?

Gastric bypass surgery involves separation of the top of your stomach from the main body of your stomach by stapling, and re-routing of your small intestine so that food will pass directly from the new smaller stomach into the small intestine.

It’s one of the most successful forms of bariatric surgery for long-term weight loss, as the size of the stomach means patients can only eat smaller meals. One of the other advantages of gastric bypass surgery is that the bypass itself causes metabolic and hormonal changes, which result in increased satisfaction and a reduced feeling of hunger. There is some evidence to suggest that you will also not absorb as many calories from food.

A gastric bypass is a permanent form of weight loss surgery, and therefore is only offered to those with a high BMI. Patients are also required to make more major lifestyle changes than those with a gastric band, and these changes must be followed due to the permanence of the surgery – it cannot be reversed.

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What happens during a gastric bypass procedure?

There are two main types of gastric bypass surgery – Roux-en-Y, which is available at The Hospital Group, and a “mini” gastric bypass. Both essentially work in the same way. 

Both the “mini” gastric bypass and Roux-en-Y gastric bypass procedures involve the creation of a small stomach pouch, which works to reduce your portion sizes. Both types of surgery also involve the re-routing of the small intestine so that food does not pass through the main body of the stomach or the first part of the small intestine. Instead, food passes straight into the lower part of your small intestine – resulting in metabolic and hormonal changes, which help you to feel more satisfied on smaller portions and overall less hungry. You will also absorb fewer calories, protein, fat, vitamins and minerals from the food you eat, and supplements are needed to help counteract this.

  1. Roux-en-Y gastric bypass (RYGB)

The Roux-en-Y surgery procedure is the main type of gastric bypass and this is the procedure carried out at The Hospital Group. It has long been considered the “gold standard” of weight loss surgery, with the first procedure performed in 1967. During a Roux-en-Y gastric bypass, two joins are made – one between the stomach & the small intestine and a second between the upper and lower small intestine. This creates the characteristic “Y” shape.

  1. One anastomosis gastric bypass (OAGB)

Often referred to as a “mini” gastric bypass or “omega loop” bypass, the one anastomosis gastric bypass is a newer procedure and was first performed in 2001. During a mini loop gastric bypass, only one join is made – the small intestine is attached directly to the pouch creating a loop shape instead of a “Y”.

What gastric bypass packages do we offer?

As gastric bypass surgery is part of a long-term weight loss strategy requiring a number of lifestyle changes, rather than simply a short-term route to losing weight, it’s important to think about aftercare so you are fully supported and best placed to achieve your goals. Whether you opt for a prime, plus or premium package, rest assured that we will support you through every stage of your journey.

All our gastric bypass packages include:

  • Your hospital, anaesthetist and surgeon fees
  • Appointments with our expert dietitians
  • Regular support from our specialist nurses
  • Surgical cover for the length of your package
  • 24-hour emergency support line
  • Private transport option to and from surgery

Prime, plus and premium packages offer varying levels of care and support to ensure you’re in the best position to achieve your weight loss goals. Your patient advisor will help you make the right choice during your free consultation. Here’s a brief overview of what is included in each of our bypass packages:

· 12 band adjustments

· 6 dietitian appointments

· 1-year surgical cover

· 18 band adjustments

· 12 dietitian appointments

· 2-year surgical cover

· 32 band adjustments

· 18 dietitian appointments

· 6-year surgical cover

Is gastric bypass surgery painful?

As with any abdominal surgery, you may find you need pain relief following surgery. On average, the gastric bypass recovery time takes between 2-4 weeks, and during this time you may need access to pain relief.

Your abdomen in general may feel sore, and the site of your wounds may hurt. However, any severe pain should be reported to your weight loss care team.

Gastric bypass surgery frequently asked questions

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When you’re deciding whether to have gastric bypass surgery, it’s reassuring to have all the facts. You’ll be able to ask any questions at your consultation, but here are some that our patients most frequently ask.

Gastric bypass FAQs

What is gastric bypass surgery?

Gastric bypass surgery is a proven method of weight loss which is ideal when you’ve a lot of weight to lose and have tried conventional weight loss methods without long-term success. The Hospital Group will not only provide your surgery, but also specialist dietitians, nurses and weight loss support team members who will help you get the best possible results on your weight loss journey.

Why get gastric bypass surgery?

Gastric surgery is a proven method of weight loss and is ideal when you have a lot of weight to lose and have tried many conventional methods of weight loss without long term success. The Hospital Group will not only provide your surgery but also a team of specialist dietitians, nurses and weight lot support team to help you get the best possible results on your weight loss journey.

Can gastric bypass surgery be reversed?

No, this type of weight loss surgery is permanent. If you are looking for something less permanent, then you could consider a gastric band instead.

What does my BMI need to be for gastric bypass surgery?

A gastric bypass may be suitable if you have a BMI (body mass index) of 40 or more, or a BMI of 35 or more if you also have an obesity-related condition, such as Type 2 diabetes. New guidelines suggest that surgery should be offered as a first-line treatment if you have recently been diagnosed with Type 2 diabetes and your BMI is over 30. These parameters are guidelines, however, and every patient is different.

Will gastric bypass surgery help if I have diabetes?

The WHO (World Health Organization) believes that being overweight/obese is major risk factor for diabetes. The unique changes in gut hormones that happen after a gastric bypass are also thought to improve diabetic control, independently of weight loss. While we cannot guarantee a change in your personal management of diabetes, many of our patients have been able to reduce their diabetic medications and improve their diabetes overall following gastric bypass surgery. Every patient is different, but new guidelines say a gastric bypass could be an effective first-line treatment for this condition.

Gastric bypass vs sleeve vs band: Which should I get?

Here at The Hospital Group, our specialist team will help you to find the best weight loss solution for you. We offer several different procedures, including gastric bypass, gastric band and gastric sleeve surgery. During your initial consultations, your patient advisor and surgeon will be able to talk you though the key differences between gastric sleeve compared to gastric bypass and band surgeries, helping you find the best solution in line with your goals.

Can I have gastric bypass surgery twice?

It’s possible to have a revision to your gastric bypass, but this does have increased risks of complication. For this reason, a second gastric bypass generally won’t be offered if you’ve regained weight and not followed the changes you needed to make to your diet and lifestyle.

How long does gastric bypass surgery take?

How long gastric bypass surgery takes will depends on the patient and the surgeon – but usually these operations take between 90 minutes and two hours if performed by keyhole surgery, which is almost always the case. If you are having your gastric band removed at the same time, the operation will usually take longer, but you can discuss this with your surgeon.

How long will I be in hospital?

This, again, depends on the patient and the surgeon, but usually you’ll need to stay in one of our specialist hospitals for 2-3 nights following your surgery, although sometimes you may be able to go home after one night.

What are the advantages of gastric bypass surgery?

For the seriously obese, the advantages of gastric bypass surgery tend to outweigh the risks. The benefits generally include:

  • Improvements in risk factors for heart disease and cancer
  • Up to 85% of patients with hypertension will be off medication (source: National Bariatric Surgery Registry Report 2014)
  • Cholesterol levels will fall
  • 80% of Type 2 diabetics will be off medication after three years (source: National Bariatric Surgery Registry Report 2014)
  • Improvements in a range of conditions, including sleep apnoea, asthma, joint pain, arthritis, reflux, fatigue and shortness of breath
  • Patients report reduced feelings of depression, improved self-esteem and confidence, along with an increased sense of wellbeing

What can I eat after gastric bypass surgery?

It’s really important to follow the advice of your dietitian and surgeon in relation to your diet after gastric bypass surgery. You’ll need to follow a nutritious and healthy diet, ensuring you are consuming the right amounts of protein and vitamins after your gastric bypass. Our team will go through this in detail with you, so you know exactly what foods you can eat after gastric bypass surgery.

Usually, after 2-3 months, most patients are back on a varied diet of solid food. However, some patients may struggle with certain textures of food such as bread or red meat. In addition, a phenomenon known as Dumping Syndrome can occur if too much sugar is consumed – this results in symptoms such as dizziness, sweating, palpitations and bloating. Often patients say that these symptoms help to discourage them from eating too much sugar, which can then enhance weight loss.

Are there any gastric bypass side effects?

As with any surgery, there can be operative and long-term complications after gastric bypass surgery. These may include bleeding, complications due to anaesthesia and medications, infections, blood clots on the lung, deep vein thrombosis, wound breakdown, leaks from the staple line, injury to the spleen and marginal ulcers.

Please know that our expert surgeons are highly skilled and experienced in performing bariatric procedures, and that any gastric bypass side effects are rare. Our team will talk you through all possible short and long-term risks of gastric bypass surgery so you’re fully informed before having the procedure.

Is there a gastric bypass post-surgery diet to follow?

Our expert team of dietitians will talk to you in detail about what foods you can eat after gastric bypass surgery, and help you make sure you’re getting all the nutrition you need. Generally, you’ll have to follow a more nutritious diet after a gastric bypass, since your portions will be smaller and fewer nutrients will be absorbed. It’s important you are managing a good protein intake, so our dietitians will advise you on this. Also, because you won’t be able to absorb as many minerals and vitamins after your gastric bypass, you’ll have to take supplements for life and will need regular blood tests to check for any nutritional deficiencies. Here at The Hospital Group, we offer a wide range of weight loss supplements to help you with your gastric bypass diet.

What happens after the gastric bypass procedure?

Gastric bypass surgery reduces the size of your stomach as well as bypassing part of the small intestine. This means that you will only be able to manage smaller portions of food, your body will absorb fewer calories, and changes in your gut hormones will lead to reduced feelings of hunger. You should also feel satisfied for longer on your smaller portions. As with any weight loss, a healthy diet and regular exercise are needed alongside your surgery for the best results. You will have to make a few lifestyle changes.

How long is the gastric bypass recovery time?

The gastric bypass recovery time varies from person to person. Your surgeon and bariatric team will advise you on this within your personalised care plan. After your surgery, you’ll have to stay in hospital for 2-4 nights. We then advise doing nothing too strenuous for at least six weeks after your surgery.

How much is gastric bypass surgery?

At The Hospital Group, we understand that each patient has different requirements and individual weight loss goals. That’s why we create a bespoke treatment plan in line with your needs. For this reason, the gastric bypass cost varies, but you can use our price check as a rough guide.

As well as being able to pay for your treatment outright, we have finance options available to help you spread the cost of gastric bypass surgery over 24, 36, 48 or 60 months. We also offer a 0% interest payment plan, allowing you to make monthly repayments over a 12-month period without any interest. Please note that all our finance options are subject to individual status and Ts & Cs apply. Our finance plans are provided by Omni Capital Retail Finance Limited who are regulated by the Financial Conduct Authority.

What are the short and long-term risks of gastric bypass surgery?

While the operative and long-term risks of gastric bypass surgery today are small, there are some risks that should be considered before undergoing the surgery. Some of these complications take place during and directly after the surgery, while others are long-term.

Although uncommon, some of the immediate gastric bypass side effects include:

  • Bleeding
  • Anaesthesia complications
  • Infection
  • Blood clots on the lungs
  • Deep vein thrombosis
  • Wound breakdown
  • Leaks from the staple line
  • Spleen injury
  • Ulcers

These gastric bypass surgery complications are all rare, and your weight loss care team will discuss them in detail with you when planning your procedure.

The long-term side effects of gastric bypass surgery are usually a result of not following the necessary lifestyle changes – for instance, dietary requirements that will ensure you don’t become vitamin or mineral deficient. You may need to take nutritional supplements and vitamins after gastric bypass surgery for the rest of your life, which can include specific doses of multivitamins and minerals, iron, vitamin B12, calcium and vitamin D.

Some patients who have undergone gastric bypass surgery also report a side effect known as ‘dumping’. This refers to cramping, light-headedness and lethargy that can happen after eating or drinking anything high in carbohydrates – especially sugar.

However, following a gastric bypass diet plan will help to reduce the risk of this and other possible side effects. Rest assured that our team of experts will explain exactly what you can eat after your gastric bypass, and foods to avoid – if any.

More details on gastric bypass surgery

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At The Hospital Group, we’re here to look after you. As UK market leaders in weight loss management, we offer advice you can trust, treatment based on your individual needs, and support throughout your journey with us. Here’s a step-by-step guide to what you can expect from your gastric bypass operation.

The first step of your weight loss journey with us is to meet your patient advisor in your local clinic. During your free consultation, you can discuss the different weight loss options available, why you’re considering surgery, the gastric bypass cost, the various payment options and more. We’ll discuss whether a gastric bypass will be the right choice for you, and you’ll be able to ask any questions you may have, from the aftercare to the dietary requirements. You’ll be given a full breakdown of the gastric bypass price, be advised as to when you may be able to have the surgery, and be provided with information on our state-of-the-art facilities.

If you’d like to go ahead, we can book your gastric bypass surgery at your consultation – but there’s no obligation to proceed, it’s completely up to you. We understand that having a gastric bypass is a big decision, so you may want to take some time to think it over and do some research. At your consultation, we’ll give you a detailed booklet packed full of information about your procedure, including the gastric bypass dietary requirements and aftercare. It’s important to read this thoroughly, as well as checking out our website where you’ll find information on our highly experienced surgeons and our CQC-registered facilities, and read the stories of other people who have embarked on their weight loss journey with us. If you decide you’d like to go ahead with gastric bypass surgery, simply let your patient advisor know and they’ll book it for you. And because of our a 14-day cooling off period, if you change your mind during that period you can cancel without any charge.

On the day of your surgery, your medical team will make your experience as comfortable as possible. You’ll meet your surgeon again before the procedure. Gastric bypass surgery is carried out under general anaesthetic and you’ll need to stay in hospital afterwards. There are several varieties of bypass, including Roux-en-Y and “mini” gastric bypasses, but all involve dividing the stomach to create a small stomach pouch and then attaching a section of the small intestine to the pouch, therefore bypassing part of the small intestine. The smaller stomach pouch restricts the amount of food you can eat and is designed to make you feel full after smaller meals. It also aims to drop appetite hormone levels to reduce your appetite. Bypassing part of the small intestine reduces how many calories you absorb from food, as well as vitamins and minerals, and so supplements are required for life. Please note that gastric bypass surgery is non-reversible.

We’ll be here throughout your recovery process in order to help you recuperate quickly. For gastric bypass surgery, you’ll need to stay in the hospital where your surgery has taken place for 2-4 nights, depending on your procedure. Each patient is given a personalised care plan, developed on the advice of their surgeon. All THG hospitals are equipped to the highest standards of clinical care and patient comfort and are CQC-registered.

When you have a gastric bypass, the actual surgery is only the start of your journey. At The Hospital Group, we offer a full package of aftercare support to help you achieve your weight loss goals. Exactly what benefits you’ll get will depend on the package you choose, but all our aftercare includes access to a 24-hour emergency helpline, appointments with our specialist dietitians, support from our nurses and access to a weight loss support team. You can find out more about our packages on our dedicated weight loss aftercare page.

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Meet our surgeons

At The Hospital Group, we’re leaders in weight loss and cosmetic surgery in the UK, with a team of highly experienced GMC-registered surgeons who perform hundreds of procedures every year

Dr Riccardo Frati

Mr Frati isa qualified cosmetic surgeon forThe Hospital G …

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Benjamin Khoda

Mr Benjamin Khoda specialises in breast augmentation surg …

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David Hewin

Mr Hewin qualified in Medicine in 1989 and specialised in …

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Dr Nicholas Morris

Mr Morris is one of the leading independent Consultant Gy …

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George Samouris

Mr Samouris was educated in medical and surgical training …

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Hassan Sulaiman

Our expert surgeon Mr Sulaiman’s specialist areas i …

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Marcos Sforza

Mr Sforza has performed well over a thousand cosmetic sur …

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Martin Richardson

Mr Richardson qualified in Medicine in 1989. His speciali …

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Mr Akhtar

Mr Akhtar qualified in medicine in 1996 and completed his …

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Mr Bhatty

Mr Bhatty is a UK trained cosmetic surgeon. He has worked …

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Mr Clarke

Mr Clarke qualified in 1986, gained his FRCS in 1990 and …

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Mr Gesakis

Mr. Gesakis is a UK trained and European Board Certified …

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Mr Jones

Mr Jones has been providing cosmetic surgery services sin …

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Mr Lahoud

Mr Lahoud qualified in medicine in Italy (1994) and compl …

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Mr Nathan

Mr Nathan has 15 years surgical experience in the NHS and …

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Mr Srouji

Mr. Srouji has held a consultant position in the NHS sinc …

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Mr Brian Simons

Mr. Simons is part of the team of plastic and aesthetic s …

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Mr Giorgio Netri

Mr Netri qualified in medicine in Rome in 2003 and then c …

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Mr Paul Super

Mr Super qualified in Medicine in 1987 and trained in Bar …

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Mr Reza Alamouti

Mr Alamouti is one of our top breast augmentation, fat re …

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Ms Hadden

Ms Hadden qualified in 1988 and obtained her FRCS in 1995 …

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Nizar Hamadeh

Mr Nizar Hamadeh specialises in Cosmetic Facial Surgery a …

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Rajwinder Nijjar

Mr Nijjar qualified in Medicine and Surgery in 1994, and …

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Sheikh Ahmad

Mr Ahmad qualified in medicine in 1985 he completed the s …

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Dr Riccardo Frati

Mr Frati isa qualified cosmetic surgeon forThe Hospital Group, performing all areas of cosmetic s …

Benjamin Khoda

Mr Benjamin Khoda specialises in breast augmentation surgery, rhinoplasty, and tummy tuck among o …

David Hewin

Mr Hewin qualified in Medicine in 1989 and specialised in Upper GI Surgery in 2001.

Dr Nicholas Morris

Mr Morris is one of the leading independent Consultant Gynaecologists in London. He qualified fro …

George Samouris

Mr Samouris was educated in medical and surgical training in Italy and Greece, before continuing …

Hassan Sulaiman

Our expert surgeon Mr Sulaiman’s specialist areas include some of our most popular cosmetic …

Marcos Sforza

Mr Sforza has performed well over a thousand cosmetic surgery procedures at The Hospital Group al …

Martin Richardson

Mr Richardson qualified in Medicine in 1989. His specialist training has focused on banding, gast …

Mr Akhtar

Mr Akhtar qualified in medicine in 1996 and completed his specialist training in plastic surgery …

Mr Bhatty

Mr Bhatty is a UK trained cosmetic surgeon. He has worked as a Consultant Plastic Surgeon both in …

Mr Clarke

Mr Clarke qualified in 1986, gained his FRCS in 1990 and completed five years’ specialist t …

Mr Gesakis

Mr. Gesakis is a UK trained and European Board Certified Plastic Surgeon specialising in Cosmetic …

Mr Jones

Mr Jones has been providing cosmetic surgery services since 2000. He has achieved accreditation f …

Mr Lahoud

Mr Lahoud qualified in medicine in Italy (1994) and completed his Residency in Plastic & Reco …

Mr Nathan

Mr Nathan has 15 years surgical experience in the NHS and has practised cosmetic surgery independ …

Mr Srouji

Mr. Srouji has held a consultant position in the NHS since September 2010, and is heavily involve …

Mr Brian Simons

Mr. Simons is part of the team of plastic and aesthetic surgeons of Transform and The Hospital gr …

Mr Giorgio Netri

Mr Netri qualified in medicine in Rome in 2003 and then completed the specialist training in plas …

Mr Paul Super

Mr Super qualified in Medicine in 1987 and trained in Bariatric surgery in 2001.

Mr Reza Alamouti

Mr Alamouti is one of our top breast augmentation, fat reduction & tummy tuck surgeons.

Ms Hadden

Ms Hadden qualified in 1988 and obtained her FRCS in 1995. From 1992 – 1999, Ms Hadden&#821 …

Nizar Hamadeh

Mr Nizar Hamadeh specialises in Cosmetic Facial Surgery and has 11 years surgical experience incl …

Rajwinder Nijjar

Mr Nijjar qualified in Medicine and Surgery in 1994, and achieved Master of Science from Universi …

Sheikh Ahmad

Mr Ahmad qualified in medicine in 1985 he completed the specialist training in general surgery in …

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