In this article from our “You Ask, We Answer” series, we have gathered the questions people search for most about gastric sleeve surgery in Turkey, selected from real search data, and answered them from our experience accompanying patients, drawing on trusted medical sources. The list opens with the five most important questions, and most answers are followed by a link to our detailed article on the topic. To see the bariatric surgeons we work with, visit our gastric sleeve surgery page.
The Five Most Important Questions About Gastric Sleeve in Turkey
1. How much does gastric sleeve surgery cost in Turkey?
Gastric sleeve surgery in Turkey through International Clinics starts from $2,750, and the all-inclusive package costs $3,250, covering the operation, tests, accommodation and transfers (Source: International Clinics — Turkey). The final price is confirmed once the surgeon has reviewed your medical history and test results.
| Option | Price (USD) |
|---|---|
| Gastric sleeve surgery through International Clinics | From 2,750 |
| All-inclusive package through International Clinics | 3,250 |
| Gastric sleeve in the Turkish market in general | 2,000–4,000 (Source: social media platforms) |
International Clinics prices in the table (Source: International Clinics — Turkey). For comparison, ASMBS states that the average cost of bariatric surgery in general in the United States is between $17,000 and $26,000 (Source: ASMBS).
For more details, see our article: Gastric sleeve in Turkey: cost and what the package includes.
2. What is gastric sleeve surgery and how is it done?
Gastric sleeve surgery (sleeve gastrectomy) is a weight-loss operation in which the surgeon removes about 80% of the stomach, leaving a narrow tube roughly the size and shape of a banana (Source: Mayo Clinic). The removed part takes with it most of the tissue that produces the hunger hormone (Source: ASMBS), so the patient feels full after a few small bites, feels less hungry and gains better blood sugar control (Source: Mayo Clinic).
The operation is performed laparoscopically under general anaesthetic: the surgeon makes about five small incisions in the upper abdomen, inflates it with gas to create working space, then divides the stomach with a surgical stapler and removes the excised part (Sources: NHS and Cleveland Clinic). The small intestine and the rest of the digestive tract are left untouched (Source: ASMBS).
For more details, see our article: Types of bariatric surgery.
3. How much weight do you lose after gastric sleeve surgery?
Most patients lose about 25% to 30% of their total body weight within two years of the operation; some lose more and some less (Source: Mayo Clinic). Cleveland Clinic reports the same average in the first or second year, and notes that it remains stable over five years (Source: Cleveland Clinic). If you weigh 120 kg, for example, this percentage means roughly 30 to 36 kg — approximate figures, not promises.
Weight loss usually continues for two to three years (Source: MedlinePlus). In the long term, median excess weight loss after ten years was 43.5% in a Finnish randomised trial that followed 240 patients (Source: SLEEVEPASS trial, JAMA Surgery 2022).
4. What are the risks and side effects of gastric sleeve surgery?
Like any major operation, gastric sleeve surgery has risks, some of which appear in the first few days and others months or years later (Source: Mayo Clinic). Knowing them in advance helps you spot a problem in time.
| Timing | Possible risks |
|---|---|
| Right after surgery | Bleeding, infection, anaesthetic complications, blood clots in the legs or lungs, breathing problems, and leakage from the staple line |
| In the long term | Narrowing of the stomach, acid reflux, vitamin and mineral deficiencies, low blood sugar, hernia, bowel obstruction, and persistent nausea or vomiting |
| With rapid weight loss | Gallstones, and excess skin after major weight loss |
The risks in the table are based on data from Mayo Clinic and NHS.
For more details, see our article: Gastric sleeve surgery side effects.
5. Is gastric sleeve surgery dangerous? Can it be fatal?
Serious complications are uncommon: Cleveland Clinic states that surgical complications occur in fewer than 1% of sleeve gastrectomies (Source: Cleveland Clinic), and ASMBS puts the risk of death from bariatric surgery in general at about 0.1% and the risk of major complications at about 4% (Source: ASMBS). Death caused by a gastric sleeve occurs only in very rare cases (Source: Mayo Clinic).
ASMBS advises anyone travelling for bariatric surgery to choose an accredited hospital, check the surgeon’s credentials, and arrange follow-up care at home before the operation (Source: ASMBS).
For more details, see our article: How safe is gastric sleeve surgery?.
The Operation, Its Techniques and Who It Suits
6. Who is a candidate for gastric sleeve surgery? What is the minimum weight for the operation?
Eligibility is not measured in kilograms but by body mass index (BMI), which combines weight and height. According to the international criteria issued by ASMBS and IFSO in 2022 and the thresholds used by Mayo Clinic, a gastric sleeve may suit you if your BMI is 35 or higher, or 30 or higher with type 2 diabetes or another serious obesity-related condition (Sources: ASMBS and Mayo Clinic). Surgery usually comes after diet, exercise and medication have failed to achieve a lasting result (Source: Mayo Clinic).
| Organisation | BMI threshold for considering surgery |
|---|---|
| ASMBS and IFSO (2022) | 35 or higher, or 30 or higher with type 2 diabetes; considered between 30 and 34.9 if non-surgical methods have not worked |
| Mayo Clinic | 35 or higher, or 30 to 34.9 with a serious obesity-related condition |
| NHS (United Kingdom) | 40 or higher, or 35 to 40 with a condition that could improve with weight loss; thresholds may be lowered for people of certain ethnic backgrounds, including Middle Eastern |
The thresholds in the table are based on ASMBS, Mayo Clinic and NHS. The final decision rests with the surgeon after examination.
For more details, see our article: Guide to obesity treatment procedures in Turkey.
7. Are gastric sleeve and vertical sleeve gastrectomy the same operation?
Yes — the difference is only in the name. The operation’s medical name is sleeve gastrectomy, and it is also known as gastric sleeve, vertical sleeve gastrectomy (VSG) or sleeve surgery (Source: MedlinePlus); some people also loosely call it stomach reduction surgery. Other procedures with similar-sounding names, such as gastric stapling or gastric plication, are different operations.
8. How long does gastric sleeve surgery take?
The operation usually takes one to three hours (Sources: NHS and Mayo Clinic), while Cleveland Clinic and MedlinePlus give a duration of 60 to 90 minutes (Sources: Cleveland Clinic and MedlinePlus). Afterwards, the patient usually stays in hospital for one to three days (Source: NHS), and the package plans for two nights (Source: International Clinics — Turkey).
9. Is gastric sleeve surgery painful?
You feel nothing during the operation, because it is performed under general anaesthetic and you are asleep throughout (Source: Mayo Clinic). Afterwards, the doctor prescribes painkillers and a medicine to reduce stomach acid to take at home, and you are asked to walk several times a day (Source: MedlinePlus), since walking early, from the first hours, helps recovery (Source: ASMBS).
10. What is the difference between laparoscopic gastric sleeve and non-surgical sleeve?
In laparoscopic sleeve gastrectomy, about 80% of the stomach is removed through small incisions in the abdomen (Source: NHS). Endoscopic sleeve gastroplasty is a different procedure: the doctor passes a flexible tube fitted with a suturing device through the mouth, folds the stomach and stitches it from the inside, reducing its size by up to 80% with no incisions and no removal of tissue. The patient usually goes home the same day, and the procedure may be reversible (Source: NHS).
To compare the sleeve with other options that do not require surgery, read Stomach Botox in Turkey and Gastric pill balloon in Turkey.
For more details, see our article: Endoscopic sleeve gastroplasty.
11. Can gastric sleeve surgery be done through a single incision?
Medical sources describe the standard technique as being performed through several small incisions, from two to five (Sources: MedlinePlus and NHS). If you are offered the single-incision approach, ask the surgeon about their experience with it, why it was chosen for your case, and what it changes in terms of risks and recovery.
12. Can gastric sleeve surgery be reversed?
No, a gastric sleeve cannot be reversed, because the removed part of the stomach is taken out permanently (Sources: NIDDK and MedlinePlus). However, a sleeve can be surgically revised or converted to another operation, such as gastric bypass, if weight returns or acid reflux becomes severe (Source: Cleveland Clinic). That is why the decision deserves calm reflection and a frank discussion with the surgeon before you travel.
Gastric Sleeve Compared With Other Operations
13. Which is better: gastric sleeve or gastric bypass?
No single operation is best for everyone: the sleeve is simpler and causes fewer nutritional problems, while gastric bypass may achieve slightly greater weight loss and suits many patients with acid reflux (Sources: ASMBS and SLEEVEPASS trial, JAMA Surgery 2022). The surgeon recommends one or the other after considering your BMI, diabetes, reflux and medical history.
| Comparison | Gastric sleeve | Gastric bypass |
|---|---|---|
| What the operation involves | About 80% of the stomach is removed; the intestine is left untouched | A small stomach pouch is created and connected to the lower part of the small intestine |
| Excess weight loss after 10 years | Median 43.5% | Median 50.7% |
| Oesophagitis after 10 years | 31% | 7% |
| Nutrition | Fewer vitamin and mineral deficiencies | More vitamin and mineral deficiencies; dumping syndrome may occur |
| Reversibility | Cannot be reversed | Difficult to reverse |
The comparison in the table is based on ASMBS, NIDDK and the SLEEVEPASS trial, JAMA Surgery 2022.
The following animation from International Clinics explains how gastric bypass works; the details are in our article Gastric bypass surgery in Turkey.
For more details, see our article: Gastric sleeve vs gastric bypass.
14. What is the difference between gastric sleeve and gastric balloon?
The sleeve is an operation in which about 80% of the stomach is permanently removed (Source: Mayo Clinic), whereas a gastric balloon is placed inside the stomach without surgery, either swallowed or inserted endoscopically, in a procedure that usually takes about 20 minutes (Source: NHS). The doctor chooses between them according to BMI and associated conditions; the balloon is covered in detail in our article Gastric balloon in Turkey.
Travelling to Turkey and Choosing the Doctor and Hospital
15. What does the gastric sleeve package in Turkey include?
The all-inclusive gastric sleeve package through International Clinics costs $3,250 and includes (Source: International Clinics — Turkey):
- Laparoscopic sleeve gastrectomy under general anaesthetic, performed by a contracted bariatric surgeon
- Pre-operative tests
- Two nights in hospital
- Five nights in a five-star hotel
- VIP transfers between the airport, hotel and hospital
- An interpreter throughout your stay
- Complications insurance
The package does not include international flights, and you receive a written offer listing everything it covers before you travel.
For more details, see our article: Gastric sleeve cost in Turkey.
16. How many days do I need to stay in Turkey after gastric sleeve surgery?
Plan to stay about seven nights: two nights in hospital and five nights in a hotel close to your surgical team, which is the period the package covers (Source: International Clinics — Turkey). Most patients leave hospital one to three days after bariatric surgery (Source: NHS), and the rest of the stay allows the surgeon to make sure you can drink and walk before you travel.
The CDC generally advises postponing flights for 10 to 14 days after major surgery, especially chest surgery (Source: CDC), so if your journey is long, ask the surgeon whether a longer stay would suit you.
17. Why is gastric sleeve surgery cheaper in Turkey?
ASMBS states that medical tourism facilities offer bariatric surgery at 40% to 80% less than the cost in the United States (Source: ASMBS). The package through International Clinics brings together the operation, tests, hospital and hotel nights, transfers and an interpreter in a single price (Source: International Clinics — Turkey). Still, a lower price is no substitute for checking the surgeon, the hospital and the follow-up plan.
For more details, see our article: Obesity surgery cost in Turkey.
18. What tests and preparations are needed before gastric sleeve surgery?
The surgeon may request blood tests, heart and lung tests, a sleep study if sleep apnoea is suspected, and a review of your medications, along with getting diabetes and blood pressure under control before surgery (Source: Mayo Clinic). Cleveland Clinic describes a two-week liquid diet before the operation to reduce fat in the abdomen and liver, and no eating or drinking for twelve hours beforehand (Source: Cleveland Clinic).
If you smoke or use e-cigarettes, you will be asked to stop, because this raises the risk of infection and leakage (Source: Mayo Clinic), and you may need to stop blood thinners and some supplements in the week before the operation, as instructed by the surgeon (Source: MedlinePlus).
19. Who is the best doctor for gastric sleeve surgery in Turkey?
No single doctor is the best for every patient; the right one for you is a surgeon experienced in cases like yours, whether you have diabetes, reflux or a very high weight. These criteria help you compare (Sources: ASMBS: Medical tourism and ASMBS: Surgery criteria):
- Specialty: a bariatric surgeon, or a general surgeon with specialised training in bariatric surgery
- Board certification: certified by the specialty board or eligible for it
- Case volume: how many sleeve gastrectomies they perform a year, and with what results
- Hospital accreditation: working in an internationally accredited hospital, such as JCI
To compare the bariatric surgeons we work with, visit our gastric sleeve surgery page.
20. What is the best hospital for gastric sleeve surgery in Turkey?
The right hospital is the one where your surgeon works, accredited by an international body such as JCI, or a centre of excellence in bariatric surgery if possible (Source: ASMBS). It should have a multidisciplinary team that includes a dietitian and psychological assessment as part of the preparation, as Cleveland Clinic describes (Source: Cleveland Clinic). The CDC points out that accreditation alone does not guarantee the outcome (Source: CDC), which is why the hospital is, in most cases, decided after choosing the surgeon.
After the Operation: Diet, Recovery and Results
21. What is the diet after gastric sleeve surgery?
Food is reintroduced in stages over about eight weeks, according to the typical plan of the UK National Health Service (Source: NHS):
| Stage | Type of food |
|---|---|
| Weeks 1 and 2 | Water and liquids, such as thin soup |
| Weeks 3 and 4 | Runny or puréed foods, such as yoghurt |
| Weeks 5 to 8 | Soft foods, such as mashed potato |
| From week 8 | Gradual return to a healthy, balanced diet in small portions |
ASMBS advises drinking at least about 1.9 litres of fluid a day and eating 60 to 100 grams of protein a day for most patients, while avoiding foods high in sugar and starch (Source: ASMBS). Eat slowly, chew well, and do not drink during meals (Source: NHS).
For more details, see our article: What to eat after gastric sleeve surgery.
22. When can I return to work and exercise after gastric sleeve surgery?
Most patients return to their usual activities after 4 to 6 weeks (Source: NHS), and Cleveland Clinic advises giving yourself a full month before expecting to return to work at full capacity (Source: Cleveland Clinic). Do not start strenuous exercise without the surgeon’s approval; then aim for about 30 minutes of moderate exercise a day (Source: ASMBS), as it protects your muscle mass while you lose weight (Source: NHS).
23. Do I need vitamins after gastric sleeve surgery?
Yes, for life. ASMBS lists multivitamins, vitamin B12, calcium, vitamin D and iron, in doses set by your treatment programme (Source: ASMBS). The NHS describes regular check-ups for at least the first two years, then an annual check that includes blood tests for vitamins and minerals (Source: NHS). Signs of malnutrition include tiredness, shortness of breath, palpitations, pale skin and numbness (Source: NHS).
24. Does hair fall out after gastric sleeve surgery?
Some patients notice hair thinning or hair loss in the first six months, along with tiredness, feeling cold and dry skin, while the body adjusts to rapid weight loss; these symptoms usually go away (Source: Mayo Clinic). That is why it is advisable to stick to your daily protein intake and the supplements prescribed by your treatment programme (Source: ASMBS).
25. When can I get pregnant after gastric sleeve surgery?
It is advisable to avoid pregnancy for 12 to 18 months after the operation, until your weight stabilises (Source: NHS). Fertility may increase as you lose weight, so agree on a suitable method of contraception with your doctor (Source: ASMBS); Mayo Clinic lists obesity-related infertility among the conditions that may improve after the operation (Source: Mayo Clinic).
26. Does gastric sleeve surgery cause acid reflux?
It can: acid reflux may worsen after a sleeve in people who already had it, and may appear for the first time in others; it is often treated with medication (Source: Cleveland Clinic). In the SLEEVEPASS trial, oesophagitis was found in 31% of sleeve patients and 7% of bypass patients after ten years (Source: SLEEVEPASS trial, JAMA Surgery 2022). So tell the surgeon about any heartburn before the operation, as it may change which procedure suits you best.
27. Can weight come back after gastric sleeve surgery?
Some patients may regain part of the weight over time, because of eating habits, low activity or biological and metabolic factors; in that case, the medical team may suggest adjusting diet and activity, psychological counselling or additional treatment (Source: Mayo Clinic). A sleeve can also be surgically revised or converted to another operation, such as gastric bypass (Source: Cleveland Clinic). In the SLEEVEPASS trial, the rate of reoperation for any reason within ten years was 15.7% after sleeve and 18.5% after bypass, a difference that was not statistically significant (Source: SLEEVEPASS trial, JAMA Surgery 2022).
28. Which conditions improve after gastric sleeve surgery?
Weight loss after a sleeve may improve or resolve several conditions, including type 2 diabetes, high blood pressure, high cholesterol, obstructive sleep apnoea and heart disease (Source: Mayo Clinic), and Cleveland Clinic adds fatty liver and joint pain (Source: Cleveland Clinic). Blood sugar may improve within days to weeks thanks to hormonal changes (Source: Mayo Clinic), and NIDDK states that bariatric surgery may extend the lives of people with severe obesity by years (Source: NIDDK).
29. Will I have loose skin after gastric sleeve surgery?
Excess skin may remain after major weight loss, and removing it is usually considered cosmetic surgery (Source: NHS). If you are thinking of having it removed, discuss the right timing for your case with your doctor.
Videos and Patient Experiences
30. Do you have a video explaining gastric sleeve surgery?
Yes. This short animation from International Clinics shows the laparoscopic ports, how the tube-shaped stomach is formed, and why small portions are enough after the operation.
31. Do you have a video of someone who had gastric sleeve surgery?
Yes. This clip from the International Clinics YouTube channel shows Malak Belkacem after her gastric sleeve surgery in Turkey. Our team will be happy to introduce you to other patients’ experiences if you ask.
Have a question you didn’t find answered here? International Clinics is not a treatment centre; it is the link between you and the surgeon and hospital that suit your case. Send our team your height, weight, medical history and the medications you take, and tell us whether you have diabetes or acid reflux; we will present your case to a bariatric surgeon from our contracted doctors, who will assess whether a gastric sleeve suits you and propose the right plan and a price quote.
Medical review and disclaimer:
This article was reviewed by a specialist physician contracted with International Clinics. It is general health information, not a substitute for medical advice, and results vary between individuals.
