In short: a gastric balloon is temporary and non-surgical, a gastric sleeve makes the stomach permanently smaller, and a gastric bypass also reroutes part of the intestine. The bypass and sleeve usually lead to more and longer-lasting weight loss than a balloon. Which one suits you depends on your BMI, your health, for example reflux or type 2 diabetes, and your goals. Your surgeon makes the recommendation.
The three options at a glance
| Gastric sleeve | Gastric bypass | Gastric balloon | |
|---|---|---|---|
| What it is | About three quarters of the stomach is removed | Small stomach pouch connected to the small intestine | Saline-filled balloon in the stomach |
| Surgery | Laparoscopic, general anaesthesia | Laparoscopic, general anaesthesia | Endoscopic, sedation, no incision |
| Permanent? | Yes, not reversible | Designed to be permanent | No, about 6 to 12 months |
| Typical weight loss reported | Around 25 to 30% of body weight | Around 30% of body weight | Around 10 to 15% of body weight |
| Hospital | 3 nights | 3 nights | Same day or 1 night |
| Stay in Istanbul | 5 to 6 days | 5 to 6 days | 1 to 2 days |
| Lifelong vitamins | Usually yes | Yes | Not usually |
Weight loss figures are typical ranges reported in studies, not a promise. Results vary with your starting weight, health, eating habits and activity.
Who usually qualifies?
The 2022 guidelines of the American Society for Metabolic and Bariatric Surgery (ASMBS) and the International Federation for the Surgery of Obesity (IFSO) recommend considering surgery from a BMI of 35, and from a BMI of 30 for people with type 2 diabetes or other obesity-related metabolic disease. Lower thresholds may apply to people of Asian background. The UK NHS uses a BMI of 40, or 35 with a weight-related condition. A gastric balloon is often used at a BMI of around 30 to 40. In every case your surgeon decides after reviewing your full health history.
Gastric sleeve: simpler, permanent
The sleeve removes the outer part of the stomach, so you eat less and feel less hungry. It does not reroute the intestine, which keeps the operation simpler and lowers the risk of some long-term problems. The main drawbacks are that it cannot be reversed and that some people develop new or worse reflux. More on the gastric sleeve page.
Gastric bypass: often chosen for reflux and diabetes
The bypass creates a small pouch and connects it to the small intestine. It often improves reflux and, in many people, type 2 diabetes. In return, lifelong vitamin supplements are essential, sugary food can cause dumping syndrome, and there are specific long-term risks such as ulcers and internal hernia. More on the gastric bypass page.
Gastric balloon: a temporary aid
The balloon takes up space in the stomach for about 6 to 12 months, depending on the type. There is no incision and you are usually back at the hotel the same day or after one night. Nausea is common in the first days. Because it is temporary, keeping the weight off depends on the habits you build. More on the gastric balloon page.
Questions to ask any clinic
- Who performs the operation, and how many of these operations does the surgeon do?
- Which hospital, and is it licensed for international patients?
- What happens if there is a complication after I fly home?
- Which vitamins and blood tests will I need, and for how long?
- For a balloon: which type is it, and how is it removed?
How we plan it
At EstheBeyond, weight loss operations are performed by experienced bariatric (obesity) surgeons in licensed partner hospitals. You send your height, weight and health history, the surgeon reviews them, and you receive a written plan with a fixed price. Request a free assessment.
This article is general information and does not replace a personal consultation with a bariatric surgeon.
Sources
- ASMBS and IFSO (2022): Indications for Metabolic and Bariatric Surgery, Surg Obes Relat Dis 18(12):1345-1356
- NHS: Weight loss surgery
- ASMBS: Metabolic and bariatric surgery
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Updated: · Information on this website is general and does not replace a medical consultation.