If you have decided on a gastric bypass in Turkey, the next question is often which bypass. Surgeons in Istanbul perform both the standard Roux-en-Y gastric bypass and the mini gastric bypass, also called the one-anastomosis gastric bypass (OAGB). They work in a similar way but are not interchangeable, and reflux is often what decides between them. New City Clinic coordinates bariatric surgery with general surgeons at partner hospitals in Istanbul; this guide explains the differences for patients from the UK, Ireland, the US and Australia.
Gastric Bypass in Istanbul, Turkey: price, package and planningBMI Calculator: Am I Eligible for Weight-Loss Surgery in Turkey?Enter your height and weight to see your BMI.Who can have a gastric bypass?
A BMI of 35 or more is considered suitable for weight-loss surgery. Between a BMI of 30 and 35, an accompanying disease such as type 2 diabetes is required. The BMI is a starting point: the surgeon makes the final decision after examining you and reviewing your tests. A bypass also requires lifelong vitamin supplements and regular blood tests, so commitment to follow-up is part of being a good candidate.
The standard Roux-en-Y bypass
A small stomach pouch is created and connected directly to a lower part of the small intestine, so food bypasses most of the stomach and the first part of the intestine. A second connection rejoins the digestive juices further down; that is why it has two connections. The operation usually takes two to three hours. Portions become smaller and the hormonal changes often improve blood sugar control. It is usually preferred when reflux is significant.
The mini (one-anastomosis) bypass
In a mini gastric bypass a long, narrow stomach tube is connected to the small intestine with a single connection instead of two, so the operation is usually shorter, about one to two hours. It is still a major bypass procedure with the same lifelong follow-up. Bile reflux is a possible issue, which is why patient selection matters; it is often considered at a higher BMI when the surgeon judges it appropriate.
Reflux: the deciding question
If you already have significant heartburn or reflux, tell the surgeon and send any gastroscopy reports. With significant reflux a standard Roux-en-Y bypass is usually the better fit, because a sleeve can make reflux worse and a mini bypass carries a risk of bile reflux. A gastroscopy before surgery helps the surgeon see the state of the stomach and plan accordingly.
Diabetes and other conditions
In many patients with type 2 diabetes, blood sugar control improves considerably after a bypass; the effect varies, and your doctor at home adjusts your medication – never change it on your own. High blood pressure and sleep apnoea can also improve with weight loss. Bring your recent blood tests, medication list and any specialist letters for the surgeon’s review.
Vitamins and long-term follow-up
After either bypass, iron, vitamin B12, calcium, vitamin D and other nutrients are absorbed less well, so supplements are taken for life and blood tests are checked regularly. Sweet foods can cause dumping – dizziness, sweating and cramps shortly after eating – which is avoided by limiting sugar. Your GP should know about the operation, because long-term blood tests are usually arranged at home.
Your stay in Istanbul and recovery
For both types of bypass, plan about 6 to 8 days in Istanbul with two or three nights in hospital. You walk and sip water from the first day. The diet then moves in stages from liquids to purées, soft food and finally small solid meals over the first weeks. Desk work usually resumes after about two weeks and intense exercise after about six weeks, with the surgeon’s approval. Most of the weight loss happens over the first 12–18 months; results vary and no figure can be guaranteed.
How a bypass compares with a sleeve
A gastric sleeve removes about three quarters of the stomach without changing the route through the intestine; it is shorter and does not need a bypass’s malabsorption follow-up, but it can worsen reflux. Our comparison of gastric sleeve and gastric bypass covers that choice in detail; this guide is for patients for whom a bypass is already on the table.
Travelling and the price
Direct flights to Istanbul run from London, Manchester, Birmingham, Edinburgh and Dublin, at around four hours, and from several major US cities; from Australia the journey involves a connection. Walk during the flight and sip water regularly. A gastric bypass is quoted individually after the surgeon’s review of your BMI, health and tests; the written quote lists the hospital, surgeon, nights in hospital, hotel and transfers. Flights are not included.
A gastric bypass in Turkey with New City Clinic
New City Clinic is an authorised health tourism intermediary registered with the Turkish Ministry of Health and HealthTürkiye. When you contact New City Clinic about a gastric bypass in Turkey, a physician first reviews your photos and medical information, and you then receive a written treatment plan with an itemised quote. Once you arrive in Istanbul, the New City Clinic team organises your airport welcome, accommodation, hospital appointments and interpreting. Your procedure is performed by a specialist physician at a Ministry of Health approved partner hospital, and follow-up continues after you return home.
Recovery timeline
Days 1–3
Surgery (1–2 hours for a mini bypass, 2–3 hours for Roux-en-Y); two or three nights in hospital, walking and sipping water from day one.
Days 6–8
Final check in Istanbul and flight home.
Weeks 1–6
Staged diet from liquids to purées and soft food; desk work after about two weeks.
Week 6
Intense exercise with the surgeon’s approval.
Months 12–18
Most of the weight loss; lifelong vitamins and regular blood tests.
Accommodation and transfers
On request, New City Clinic organises your airport–hotel–hospital transfers and your stay at partner hotels close to the hospital. The same can be arranged for a companion; details are set out in writing in your quote.
Aftercare
Medication and check-ups
Take the medication your physician prescribes as directed and attend your planned check-ups.
Smoking and alcohol
Both slow healing; avoid them before and after the procedure for the period your physician advises.
Movement and rest
Short walks support circulation; wait for your physician’s approval before strenuous exercise or heavy lifting.
When to get in touch
Contact your New City Clinic coordinator straight away in case of high fever, increasing pain, redness or anything unexpected.
Frequently asked questions
What is the difference between a gastric bypass and a mini gastric bypass?
A standard Roux-en-Y bypass has two connections; a mini (one-anastomosis) bypass has one, so it is usually shorter. Both require lifelong vitamins and follow-up.
Which bypass is better for reflux?
With significant reflux, a standard Roux-en-Y bypass is usually preferred.
What BMI do I need for a gastric bypass in Turkey?
A BMI of 35 or more is suitable; between 30 and 35 an accompanying disease such as type 2 diabetes is required. The surgeon decides after examination.
How long do I stay in Istanbul?
About 6 to 8 days, with two or three nights in hospital.
Is a mini bypass a smaller operation?
It is often shorter, but it is still a major bypass procedure with lifelong follow-up.
Will I need vitamins for life?
Yes, after any bypass, with regular blood tests.
Can a gastric bypass help type 2 diabetes?
In many patients blood sugar control improves considerably; the effect varies and your doctor adjusts your treatment.
When can I go back to work?
Desk work usually after about two weeks; physical work takes longer.
Deciding on a gastric bypass in Turkey is a confident step when it is taken with the right information and the right team. You can book a free consultation with the New City Clinic team for your questions.
This article is for general information; consult your physician for diagnosis and treatment.
