Gastric balloon in Republic of Korea: Our Best Clinics and Costs 2026

A gastric balloon is a temporary, non-surgical medical device placed in the stomach to trigger weight loss by limiting food capacity. Usually made of silicone and filled with saline or air, it occupies space to induce early fullness and slow digestion for patients with a BMI between 30 and 40.

• Insertion method: Doctors use a 20-minute endoscopic procedure or a swallowable capsule under mild sedation.
• Weight loss mechanism: The device fills 400-700ml of stomach volume to physically restrict food intake.
• Treatment duration: Most balloons stay for 6 months before endoscopic deflation and removal through the mouth.
• Clinical results: Patients typically lose 10% to 15% of total body weight during the treatment period.

Bookimed Expert Insight: South Korean clinics often combine the swallowable Elipse balloon with medical weight loss therapies like semaglutide. Leading facilities in Seoul, such as Severance Hospital and SNUH, utilize digitalized monitoring systems to track patient progress. This dual-action approach helps manage the high hunger levels often reported after the balloon is removed.

Patient Consensus: Many patients describe a challenging first 72 hours with intense nausea. However, those who pair the device with strict coaching report losing up to 25kg within the 6-month period.

An ideal candidate for a gastric balloon in South Korea typically has a Body Mass Index between 27 and 35. This non-surgical procedure suits individuals who have not achieved weight loss through diet alone and are committed to significant long-term lifestyle changes and medical supervision.

• Body Mass Index: Most effective for patients within the 27 to 35 BMI range.
• Medical history: Candidates must have no history of eating disorders or severe GE reflux disease.
• Lifestyle commitment: Success requires sticking to a 1,200-calorie diet and regular exercise post-placement.
• Health preparation: Patients should quit smoking at least 1 month before the procedure is performed.

Bookimed Expert Insight: While South Korea is famous for high-tech centers like Asan Medical Center, gastric balloon success here often depends on gender-specific tolerance. Data suggests men frequently see better results as they often manage post-procedure nausea and strict protein regimens more easily than other patient groups.

Patient Consensus: Many patients report losing up to 25kg within 6 months. They emphasize that the balloon is a tool for discipline rather than a quick fix for weight loss.

Common side effects of a gastric balloon in South Korea include temporary nausea, vomiting, and abdominal cramping during the first 3 to 7 days. Most patients experience significant bloating or pressure as the stomach adjusts to the device. These symptoms typically resolve within 1 week under medical supervision.

• Gastrointestinal adjustment: Nearly universal nausea and vomiting peak during the first 48 hours after placement.
• Abdominal discomfort: Patients often report feelings of intense bloating, pressure, or mild cramping.
• Acid reflux: Reduced stomach capacity frequently causes heartburn, often managed with proactive medication.
• Dietary intolerance: Prematurely returning to solid foods can trigger significant discomfort or sudden regurgitation.

Bookimed Expert Insight: Data from top-tier Seoul centers like Severance Hospital show that adjustment periods are shorter when patients strictly follow a 2-week liquid-to-soft food transition. Clinics with JCI accreditation often provide preventative anti-nausea protocols that significantly improve early patient comfort compared to standard care.

Patient Consensus: Many patients describe the first few days as physically demanding but emphasize that constant hydration and anti-nausea meds are essential. Most felt a psychological shift was needed to handle the intense, early sensation of fullness.