A Smaller Stomach, Not A Smaller Decision.
About eighty per cent of the stomach is removed, permanently. What that buys is a restriction and a hormonal change. What it does not buy is a result that survives without the habits, which is the part every honest programme spends most of its time on.
Do You Actually Qualify?
The classic thresholds are BMI 40 or above, or 35 or above with an obesity-related condition such as type-2 diabetes, sleep apnoea, hypertension or severe joint disease. Those have guided practice for decades and still frame most insurance criteria.
Major bariatric societies now also support surgery from BMI 30 to 35 in patients with type-2 diabetes that medication is not controlling, because metabolic benefit does not track body weight alone.
Sleeve Or Bypass: Five Questions.
- Do you have reflux? Significant existing reflux usually points to bypass, because a sleeve can worsen it. A sleeve in a patient with severe GERD is the commonest reason for later conversion surgery.
- Do you have type-2 diabetes? Bypass produces higher remission rates and faster glycaemic improvement because of hormonal changes in the rerouted gut.
- What is your BMI? Very high BMI tends to do better with bypass.
- How do you eat? Volume eaters without reflux do very well with a sleeve. Sweet-eater patterns tend to do better with bypass.
- Can you take supplements for life? Bypass requires lifelong B12, iron, calcium and vitamin D with annual bloods. If you know you will not take them, the sleeve is the safer operation for you, and an honest answer here prevents anaemia years later.
The Two-Week Liver Diet Before Surgery.
A fatty liver sits directly over the stomach and is heavy, friable and hard to retract safely. Two weeks of a low-carbohydrate, high-protein diet shrinks it measurably, which makes the operation shorter and safer.
It is not a test of willpower or a head start on the diet. Surgeons cancel operations on the table when the liver is too large to lift, and that is the outcome the two weeks exist to prevent.
The First Week, Honestly.
- Day 0-1. Sips of water only, walking within hours. Walking is the single most effective thing you do for clot risk.
- Days 2-3. Clear liquids. Nausea is common and is medicated. A leak test is performed before you are discharged onto fluids.
- Week 1. Full liquids. Fatigue is heavier than people expect, because you are healing on a few hundred calories a day.
- Weeks 2-4. Pureed, then soft. The phases are not negotiable; they protect a staple line that is still sealing.
Weight Regain: What Actually Causes It.
The stomach does not stretch back to its old size. What returns is capacity at the margins, and more importantly the eating patterns that were there before.
The two most common mechanisms are grazing, which bypasses restriction entirely because small volumes fit at any time, and liquid calories, which pass straight through. Both are behavioural, both are predictable, and both are why the follow-up programme is part of the operation rather than an add-on.
Gastric sleeve is €3,800, covering the hospital with intensive care in the same building, the anaesthetist, the leak test, the dietitian programme and the follow-up.
The Ones People Actually Ask.
How much does gastric sleeve surgery cost in Istanbul, Turkey?
At Swedish Clinic a gastric sleeve starts from €3,800, gastric bypass from €5,200 and a gastric balloon from €2,800, all-inclusive packages covering surgeon, anaesthesia, hospital stay, pre-operative tests, medication, VIP transfers and 12 months of dietitian follow-up. The same operations cost €12,000-€20,000 privately in the UK, Germany or the Netherlands.
Am I a candidate for bariatric surgery? What BMI do I need?
As a guide: BMI 27-32 usually suits a gastric balloon or botox, BMI 33-40 a gastric sleeve, and BMI 40+, or a lower BMI combined with type-2 diabetes, sleep apnoea or severe reflux, a gastric bypass. Your blood tests, endoscopy and medical history decide the final plan, and the eligibility check is free.
How much weight will I lose after a gastric sleeve?
Most sleeve patients lose 60-70% of their excess weight within 12-18 months; bypass patients typically reach 70-80%. The operation makes it possible, the dietitian programme, protein targets and activity are what keep it off, which is why follow-up is part of the package.
Is weight loss surgery in Turkey safe?
It is when it is done in the right setting. Your operation takes place in a licensed full-fledged hospital with an ICU on site, performed by a board-certified bariatric surgeon, under a Health Tourism Authorisation Certificate from the Republic of Türkiye Ministry of Health. We also hold Temos international accreditation and ISO 9001 (UKAS) certified management. Never accept bariatric surgery in a day clinic without intensive care.
How many days do I need to stay in Istanbul?
Plan 5-6 nights for sleeve or bypass: tests and endoscopy on day one, surgery on day two, 2-3 nights in hospital, then a final check before you fly. A gastric balloon needs only 2-3 nights as it is an endoscopic procedure with no incisions.
What can I eat after the operation?
Two weeks of liquids, two weeks of purées, then soft food and gradually normal meals in small portions with protein first. Your dietitian gives you a written plan for each phase in your own language and checks in monthly for a year.
Will I have loose skin after losing weight?
Some patients do, usually 12-18 months after surgery once the weight has stabilised. If it bothers you, a tummy tuck, arm lift or body contouring can be planned then. We quote those separately when the time comes, never as an upsell on day one.
Do you help with hotel, transfers and translation?
Yes. VIP airport transfers, a translator in your language and help with hotel booking are part of every package, and your coordinator stays in touch long after you fly home.