Bariatric surgery is metabolic surgery, not cosmetic surgery. It is used to treat obesity and the conditions that travel with it — type 2 diabetes, hypertension, sleep apnoea and fatty liver disease. The operations most commonly performed are sleeve gastrectomy and gastric bypass. The operation itself is the short part; eligibility assessment beforehand and nutritional follow-up for life afterwards are what determine whether the result holds. This guide covers all three stages.

The main procedures

  • Sleeve gastrectomy — a large portion of the stomach is removed, leaving a narrow tube. It restricts intake and alters appetite-regulating hormones.
  • Roux-en-Y gastric bypass — a small stomach pouch is joined directly to the small intestine, combining restriction with reduced absorption. Often preferred where reflux or diabetes is prominent.
  • Revisional surgery — conversion or repair after a previous bariatric operation. More complex than primary surgery and best done where that specific revision is performed regularly.

Which operation suits you depends on your weight, your other conditions, reflux symptoms and previous surgery. A centre that performs only one operation will tend to recommend that operation.

How eligibility is assessed

Bariatric surgery is offered against recognised clinical criteria, not on request. Assessment considers body mass index alongside obesity-related conditions such as type 2 diabetes, hypertension and sleep apnoea, previous structured attempts at weight management, and whether you are fit for anaesthesia. Thresholds vary between guidelines and countries, so the treating team makes that determination on your individual case.

A reputable programme will also screen for eating disorders and assess psychological readiness. A centre willing to operate without that assessment is not running a proper bariatric programme.

The pre-operative work-up

Expect dietetic assessment and a period of prescribed pre-operative diet, blood work including vitamin and mineral levels, screening for sleep apnoea, and in many programmes an upper gastrointestinal endoscopy to check for reflux, hernia or infection before the stomach is altered. Psychological assessment is standard in well-run units.

This work-up is not administrative box-ticking. It changes which operation is recommended, and skipping it is one of the clearest warning signs in low-quality medical travel.

What the operation does not do

Surgery changes the anatomy; it does not remove the need to change eating patterns. Weight regain is possible, particularly where dietary follow-up lapses. The procedure is a tool that makes sustained change achievable, not a substitute for it — and any programme presenting it as a guaranteed permanent solution is overselling.

Lifelong follow-up is not optional

This is the part most often underestimated, and the part that matters most once you are home. After bariatric surgery you will need lifelong nutritional supplementation and periodic blood monitoring, because the operation reduces absorption of iron, vitamin B12, vitamin D, calcium and other micronutrients. Deficiency develops quietly and can cause lasting harm if it is not detected.

You will also need dietetic support as portion tolerance changes, review of medication for diabetes and blood pressure as those conditions improve, and monitoring for complications. Doc2Go coordinates this follow-up in Abuja — scheduled blood monitoring, medication review and home visits — so that care does not stop when the flight lands.

How referrals are arranged

Doc2Go coordinates the care; the receiving hospital and its specialists perform the procedure. A physician reviews your records first, we arrange specialist opinions and referrals to accredited centres, and your follow-up continues in Abuja when you return. International referrals are arranged case by case — this is a newly launched service line, not a standing patient pipeline.

Partner disclosure. Doc2Go is an official partner of Medipol International Patient Center in Istanbul, part of Medipol Healthcare Group, whose Medipol Mega University Hospital is JCI-accredited as an Academic Medical Center Hospital. Where Medipol is the right centre for your case we can refer you directly; where another accredited centre suits you better, we will say so.

Frequently asked questions

What is the difference between a sleeve gastrectomy and a gastric bypass?

A sleeve gastrectomy removes a large portion of the stomach, leaving a narrow tube that restricts intake and alters appetite-regulating hormones. A gastric bypass creates a small stomach pouch joined directly to the small intestine, combining restriction with reduced absorption, and is often preferred where reflux or type 2 diabetes is prominent. The right choice depends on your individual case.

Who is eligible for bariatric surgery?

Eligibility is assessed against recognised clinical criteria — body mass index together with obesity-related conditions such as type 2 diabetes, hypertension and sleep apnoea, previous structured weight-management attempts, and fitness for anaesthesia. Thresholds vary between guidelines and countries, so the treating team decides on your individual case.

What tests are done before the operation?

Typically dietetic assessment and a prescribed pre-operative diet, blood work including vitamin and mineral levels, screening for sleep apnoea, and often an upper gastrointestinal endoscopy. Psychological assessment is standard in well-run programmes. A centre willing to operate without this work-up is a warning sign.

Can weight come back after surgery?

Yes. Surgery changes the anatomy but does not remove the need to change eating patterns, and regain is possible where dietary follow-up lapses. It is a tool that makes sustained change achievable rather than a guaranteed permanent solution.

What follow-up is needed afterwards?

Lifelong nutritional supplementation and periodic blood monitoring, because absorption of iron, vitamin B12, vitamin D and calcium is reduced. Deficiency develops quietly and can cause lasting harm if undetected. Dietetic support and review of diabetes and blood-pressure medication are also needed. Doc2Go coordinates this follow-up in Abuja.