Gastric bypass

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What is a gastric bypass?

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What are the benefits of a gastric bypass?

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Are there any risks?

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Is it right for me?


Why choose The Hospital Group for weight loss surgery?

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Cost & finance options


What is a gastric bypass?

Gastric bypass surgery is a procedure for men which helps you achieve long term weight loss. It can lead to a loss of 55-70% of your excess body weight within 12-18 months of surgery. You may consider this procedure if you are suffering with obesity, have exhausted all methods of diet and exercise to manage your weight, and still have a body mass index (BMI) of 30 or over. 

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During the procedure, the digestive system is reconstructed, changing the way your stomach and intestines manage your food intake. A pouch is created, making the stomach smaller, and restricting the amount of food you can eat. It also results in an increase in hormones that make you feel satisfied, and a reduction in hormones that make you feel hungry, reducing overall appetite. This can help you lose weight safely and effectively over time. 

What are the benefits of a gastric bypass?

Achieving your long-term weight loss goals can be helped by having gastric bypass surgery. You may find that substantial weight loss leads to better mobility, increased energy levels, and a number of quality of life improvements, such as greater choice of clothing styles which would have felt uncomfortable previously. 

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A number of weight-related health conditions, such as type 2 diabetes and hypertension have also been known to be improved through gastric bypass surgeryOnce you start to see the results from your procedure, you may be able to live a more active lifestyle with family and friends, and feel more confident in social situations. 

Are there any risks?

As with any surgical procedure, it is important to learn about any potential risks that the gastric bypass surgery may pose, so that you can weigh these up against the benefits of treatment. Your specialist weight loss practitioner and expert surgeon will be happy to discuss any possible complications and give you detailed information about the procedure.

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As a guide, these may include infection, bleeding, reflux, pain, and scarring

Is it right for me?

Are you suffering with obesity and have a body mass index (BMI) of 35 or over? Are you committed to making a lifestyle change? Has diet and exercise alone have proven unsuccessful in managing your weight? Then the gastric bypass could be the answer to shedding your excess weight and living a healthier life. 

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Gastric bypass surgery will help you lose weight by restricting your food intake and absorbing fewer calories. You will need to make healthier food choices and engage in regular planned exercise to ensure and maintain your results. 

At your free consultation, our expert surgeons can advise you on whether you are a suitable candidate for this procedure. 

Why choose The Hospital Group for weight loss surgery?

Weight loss conversion surgery can help you achieve your healthy lifestyle goals.

As a highly experienced provider of weight loss conversion surgery, The Hospital Group has over 4 decades of surgical expertise - helping their patients turn dreams into reality.

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Our patients are at the heart of what we do. We’re committed to providing a truly personalised experience for each person in our care. If you decide to have weight loss conversion surgery with us, you’ll benefit from:

  • World-class facilities, including our state-of-the-art private hospital, Burcot Hall in Bromsgrove, and a network of clinics nationwide so we’re never too far away.
  • Over 45 years of surgical expertise, delivered by our extensively qualified and leading surgeons.
  • Exceptional care that begins at your consultation continues throughout your journey with us, right through to the comprehensive aftercare we offer following surgery.
  • Clear, competitive costs and flexible finance options, so you can work towards your weight loss goals whatever your budget.

We are with you every step of the way on your weight loss journey.

Cost & finance options

As a responsible provider of weight loss surgery, we understand that everyone’s procedure is different, so our treatment plans are tailored specifically around your unique personal needs. Because of this, the cost of gastric bypass surgery can vary.  

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We place a great deal of importance on our free face-to-face, no obligation consultations, during which you can discuss your requirements with your surgeon assistant. They will provide detailed information on the gastric bypass surgery cost and the various payment plans available. As well as being able to pay for your procedure outright, you can choose to spread payments over several years via our flexible finance plans, which can be viewed on our pricing and finance page.  

Gastric Bypass Brochure

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Gastric bypass FAQs

More 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.

Next steps

Your journey step by step

First appointment

Your journey with The Hospital Group begins with a telephone consultation with our friendly surgeon assistants. During this conversation you can talk through why you’re interested in surgery, how much it costs, the finance options available to you, how much recovery time you’ll need, and potential surgery dates. Whenever you decide to book a surgery date, you can secure it for a minimum refundable deposit of £500.

If you would like to proceed, we will book your free weight loss consultation.

Surgical consultation

During the consultation with your surgeon, you will talk about your goals for surgery and go through your medical history to ascertain whether you are a suitable candidate for this procedure. You will also discuss the results you might expect, as well as the possible risks and complications of surgery. You will then be referred to a clinic nurse for pre-operative assessments and tests and a dietitian for discussion and advice on the pre- and post-operative diet.

The surgery

You will meet your surgeon on the day of your surgery so that you can talk through any final questions you might have and read through the consent form. The whole surgical team will be introduced to you before heading into theatre for the procedure.

The specifics of surgery will be discussed prior to the day – you will find out how long it will take, the types of anaesthetics used, and they will talk you through the procedure itself.


Following weight loss surgery, you will need to stay in hospital for the initial stages of your recovery. You will likely feel swollen and in some pain following the procedure. Our friendly nursing team will be on hand to look after you and provide any painkillers you might need.

Immediately after surgery, you will be given intravenous drip hydration so that your fluid levels are maintained. The procedure is carried out under general anaesthetic, so you will need to arrange for someone to drive you home when you are discharged. We recommend that you have someone with you until the effects of the anaesthetic wear off.

We will talk you through taking care of yourself at home before you leave hospital. There is also a 24/7 helpline available to you where you can call a member of the clinical team at any time for support.


The surgery itself is only the beginning, and we believe in the highest standard of aftercare following your procedure. Your body needs time to heal, and you will need to stay off work until you feel ready to return. You should also avoid any heavy lifting or strenuous activity for around six weeks. Recovery periods can be discussed with your surgeon before the procedure.

There are a number of different aftercare packages available to help aid you in your weight loss journey and these will be discussed during your consultation process. You can read more about these on our aftercare page.

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