Gastric Sleeve surgery, also known as a sleeve gastrectomy, is where the capacity of your stomach is reduced by 60% to 70%.
It works by reducing your stomach size, limiting the amount you can eat.
On average patients will lose 65% of their excess weight with a gastric sleeve.
A key benefit of gastric sleeve surgery is its ability to significantly reduce hunger and help you feel full more quickly. This makes it much easier to adopt healthier eating habits and maintain long-term weight loss success.
The procedure works by removing the upper portion of the stomach, where most of the hunger hormone ghrelin is produced. With lower ghrelin levels, your appetite naturally decreases—making it easier to control portion sizes and avoid overeating.
Gastric sleeve surgery works by dramatically reducing the size of the stomach, so it can no longer hold large amounts of food between meals.
During the procedure, the stomach is stapled vertically and reshaped into a narrow tube—just over one centimetre in diameter—reducing its capacity by around 60–70%. As a result, patients feel full much sooner and are unable to eat large meals, helping them adopt healthier portion sizes and support sustainable weight loss.
To be eligible for a gastric sleeve most patients will need to have a BMI over 35, but with illnesses related to weight such as diabetes or high blood pressure surgery may be appropriate at lower BMIs. You can calculate your BMI using our online tool.
To support your success as with any weight loss surgery, patients need to be prepared to work hard and follow the advice given by your clinical team.
However, not everyone is suitable for the Gastric Sleeve procedure and you would need an initial assessment with a Bariatric Consultant Specialist to assess your suitability and ensure the Gastric Sleeve is right for you.
I’m a better mum, I’m a better wife, I’m a better everything.
Emma lost 6 stone with the Gastric Sleeve
What a great team
What a great team ! Very friendly and supportive from Rachel Bennett the Co ordinator to the Surgeon Nick Carter. Plus the aftercare is brilliant can’t fault my experience best thing I’ve ever done.
Date: Jan 7, 2025
Can’t fault the service
Can’t fault the service and aftercare I’ve received and highly recommended them
Date: Jan 3, 2025
Excellent services
Excellent services provided my Shaw Somers and his team, from the initial consult through to aftercare post surgery. Bast decision I ever made and can’t recommend Streamline highly enough.
Date: Jul 13, 2024
A weight loss provider you can trust
Streamline is a leading weight loss provider in the United Kingdom, owned and led by experienced weight loss surgeons Shaw Somers & Guy Slater. With over two decades of dedicated service, we have earned a reputation for excellence in delivering both surgical and non-surgical weight loss solutions. Our commitment to patient care is reflected in our track record of supporting thousands of individuals in achieving their weight loss goals.
At Streamline, we take pride in working exclusively with the most highly rated and skilled surgeons in the country. Whether you are seeking surgical interventions, such as bariatric surgery, or exploring non-surgical options, we ensure that every treatment is tailored to your unique needs.
Premium aftercare packages
Throughout the duration of your aftercare, and beyond, we are here to support you on the journey to a healthier you.
Our commitment to you extends beyond your initial aftercare package, which is why we our team are always on hand to provide you with any additional support or advice you need.
Our aftercare packages have been built by specialist bariatric experts to support you for life.
At Streamline, we are proud to offer some of the most competitive prices for gastric sleeve surgery in the United Kingdom, with prices starting from £9,150.
We have built different price plan options focussing on a personalised solution, tailored to you and your budget.
At Streamline, we’ve been proudly supporting our weight loss patients on their weight loss journeys since 2006.
They are an incredible example to others considering taking the next step on their weight loss journey.
Personalised aftercare, tailored to you
At Streamline Weight Loss, we’re proud to offer some of the most competitive gastric sleeve surgery prices in the UK, with packages starting from £9,150. This all-inclusive price covers your full pre-operative assessments, the surgery itself, and a personalised aftercare packages to support your long-term success.
Swipe to view aftercare plans >
We are proud to partner with VitalityHealth, the UK’s exclusive private health insurer offering coverage for weight loss surgery.
If you’re a VitalityHealth policyholder, you may be eligible to undergo weight loss surgery at Streamline.
We provide weight loss surgery across a number of locations around the South of England and Birmingham, our team of patient advisors are on hand to help find the most suitable location for you.
Chelsea & Westminster Hospital
369 Fulham Rd, London, United Kingdom, SW10 9NH
The Spire Bushey Hospital
Heathbourne Rd, Bushey WD23 1RD, United Kingdom
The Luton & Dunstable University Hospital
NHS Foundation Trust, The L&D Hospital, Lewsey Rd, Luton LU4 0DZ, United Kingdom
The Berkshire Independent Hospital
Swallows Croft, Wensley Rd, Coley Park, Reading RG1 6UZ, United Kingdom
Chelsfield Park Hospital
Bucks Cross Rd, Chelsfield, Orpington BR6 7RG, United Kingdom
Nuffield Health Guidford Hospital
Stirling Rd, Guildford GU2 7RF, United Kingdom
One Hatfield Hospital
Hatfield Ave, Hatfield AL10 9UA, United Kingdom
BMI Clementine Churchill Hospital
Sudbury Hill, Harrow HA1 3RX, United Kingdom
Spire Portsmouth Hospital
Bartons Rd, Havant PO9 5NP, United Kingdom
Queen Alexandra NHS Trust Hospital
Cosham, Portsmouth PO6 3LY, United Kingdom
As leading weight loss experts in the UK, Streamline only work with the very best surgeons who have extensive experience in performing gastric sleeve surgeries with amazing results.
Your questions answered
The Gastric Sleeve, known as a sleeve gastrectomy, is one of our most popular weight loss procedures where the capacity of your stomach is reduced by 80%. This transforms your stomach from a large grapefruit size to a narrow tube the size of a banana.
The gastric sleeve, also known as a laparoscopic sleeve gastrectomy used to be the first part of a two-stage operation, the duodenal switch, a malabsorptive operation, which was usually reserved for patients with very high body mass indexes, greater than 60 kg/m2. But with time, it became clear that many patients had successful, sustained weight loss, with the gastric sleeve alone.
Increasingly surgeons recognised the sleeve’s reliability and increasing numbers of patients chose the sleeve over the gastric bypass recognising it was easier to live with in the longer-term. The sleeve gastrectomy became increasingly popular, from the early 2010s onwards. Since then, more and more long-term outcome studies have been published, supporting its effectiveness as a weight loss operation and also a metabolic operation for illnesses such as diabetes.
The length of time the gastric sleeve surgery takes to perform depends on the patient and the surgeon. For an easy sleeve, the surgery will take 45 to 60 minutes however, for more difficult procedures this can take much longer, up to two hours. The important thing to remember is, it’s not important how long a patient spends under anaesthetic; it is much more important the surgery is completed carefully to minimise the risk of any complications
No, the gastric sleeve is not reversible. However, it can be coNverted to a different weight loss procedure such as a gastric bypass.
At Streamline, we are proud to offer some of the most competitive prices for gastric sleeve surgery in the United Kingdom, with prices starting from £9,150.
Recovery from gastric sleeve surgery, is usually quick, with many patients feeling better the morning after surgery and then every 12 hours after that, feeling much better. The first night after surgery can be tough as you may experience nausea, generalised abdominal pain however, this usually passes after 24 to 48 hours after surgery. Most patients are fit for discharge on their second day and by this time are mobile and self-caring. Most patients take two weeks off work and are thereafter back to most of their usual activities, but strenuous exercise is not recommended until around 6 weeks after surgery but everyone is different and Streamline take this into account.
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