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Metabolic surgery uses bariatric procedures — most often gastric bypass or sleeve gastrectomy — specifically to treat type 2 diabetes. Beyond weight loss, these operations change gut hormones that improve blood sugar control, helping many patients reduce their medication and, in some cases, achieve remission.
Metabolic surgery uses bariatric procedures — most often gastric bypass or sleeve gastrectomy — specifically to treat type 2 diabetes. Beyond weight loss, these operations change gut hormones that improve blood sugar control, helping many patients reduce their medication and, in some cases, achieve remission.
“Diabetes surgery” (metabolic surgery) applies established bariatric operations to improve or resolve type 2 diabetes. The rerouting or restriction changes gut hormones (such as GLP-1) that boost insulin response — an effect that often begins before major weight loss. The specific procedure is chosen with your surgeon and endocrinologist.
Treatment is planned jointly by a surgeon and an endocrinologist:
Assessment — blood work, HbA1c and a metabolic review confirm whether surgery can help your diabetes.
Procedure selection — the most suitable operation (e.g., bypass or sleeve) is chosen for your profile.
Surgery — performed laparoscopically under general anaesthesia, usually in 2–3 hours.
Recovery & monitoring — blood sugar is monitored closely; medication is adjusted as control improves.
You may be a suitable candidate if you:
Have type 2 diabetes, especially if it is poorly controlled on medication
Often have a BMI of 30–35 or above (criteria vary by guideline)
Want to reduce diabetes medication or pursue remission
Are committed to nutrition, follow-up and lifestyle change
Are healthy enough for laparoscopic surgery
Real patient outcomes from Marmara Health Center
Hospital stay; blood-sugar monitoring; liquid diet
Light activity; medication review
Staged diet; ongoing glucose monitoring
Endocrine follow-up; many reduce or stop some medication
Many patients see improved blood sugar within days and reduce their diabetes medication over the following months; earlier surgery generally gives a better chance of remission.
Diabetes surgery carries the same risks as the underlying bariatric operation chosen (such as bleeding, infection, leak, blood clots and nutritional deficiencies needing lifelong supplements). It is not a guaranteed cure: results depend on the type and duration of diabetes, the procedure and adherence to follow-up. Blood sugar must be monitored carefully and medication adjusted by your team.
Ministry-authorised health tourism — operating under the Republic of Türkiye Ministry of Health Health Tourism Authorization Certificate and a member of Health Türkiye.
Experienced multidisciplinary team — strong academic background and a high volume of successful procedures.
Accredited partner hospital — treatment in a fully equipped, modern clinical setting.
All-inclusive care — free online consultation, VIP airport transfers, accommodation, interpreter support and follow-up.
The most common questions about this treatment
Bariatric/metabolic operations change gut hormones (such as GLP-1) that improve how the body releases and responds to insulin. This effect often begins before major weight loss, which is why surgery can improve blood sugar quickly and help reduce medication.
It is not a guaranteed cure, but many patients achieve remission or a major reduction in medication. The chance is higher when surgery is done earlier and diabetes has been present for less time. Your team assesses your likelihood individually.
Most often gastric bypass or sleeve gastrectomy, sometimes a mini-bypass. The choice depends on your diabetes, weight, blood values and goals, decided together with your surgeon and endocrinologist.
Not necessarily. Metabolic surgery is often considered for type 2 diabetes at a BMI of around 30–35 or above, though criteria vary by guideline. An individual assessment confirms whether you are a candidate.
International patients usually stay about 7 days, covering pre-operative tests, the operation, a 2–4 night hospital stay and a post-operative check before flying home.
Explore other bariatric surgery options
Gastric sleeve surgery (sleeve gastrectomy) is a laparoscopic weight-loss operation that removes about 75–80% of the stomach, leaving a slim, banana-shaped "sleeve." Because the part of the stomach that produces most of the hunger hormone (ghrelin) is removed, you feel full sooner and hungry less often — driving significant, lasting weight loss.
Learn More
Gastric bypass (Roux-en-Y) is a laparoscopic weight-loss operation that creates a small stomach pouch and reroutes part of the small intestine. This both limits how much you can eat and reduces how many calories you absorb, producing strong, lasting weight loss and a powerful effect on type 2 diabetes and severe acid reflux.
Learn More
A gastric balloon is a non-surgical weight-loss option in which a soft silicone balloon is placed in the stomach and filled with saline. It takes up space so you feel full sooner and eat less. It involves no incisions, is temporary, and is fully reversible — a useful first step or an option for lower BMI.
Learn MoreFor detailed information about our aesthetic, hair, dental and bariatric treatments, please use the contact channels below. Initial consultations for international patients can be arranged remotely via video call or WhatsApp.
Marmara Health Center
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