ESG vs Gastric Balloon: How They Differ and How to Choose

The two work in fundamentally different ways

ESG (endoscopic sleeve gastroplasty) is performed with an endoscope passed through the mouth, together with a suturing device that folds and stitches the stomach wall from the inside, narrowing it into a tube-like shape. International standards-of-practice consensus describes the technique as reducing gastric volume by roughly 70%. No stomach tissue is removed, there are no abdominal incisions, and nothing is left implanted. What changes is the shape and capacity of the stomach itself, so there is no expiry date.

An intragastric balloon is placed endoscopically and filled with fluid or air so that it occupies space inside the stomach, limiting how much you can eat and bringing on fullness sooner. The stomach's structure is unchanged, and at the end of the term the device is removed at a second endoscopy. A balloon gives you a defined window of advantage rather than a change that stays with you.

That single difference drives almost every other line in the table below.

ESG vs gastric balloon: full comparison

What the head-to-head research shows

Unusually for this kind of comparison, studies exist that put the two side by side, so the answer does not have to be pieced together from separate trials.

• Size of the effect. A meta-regression pooling comparative studies found significantly greater total body weight loss with ESG (mean difference 2.541; 95% CI 0.754–4.327; p=0.005).
• Time widens the gap. The same analysis found the difference grew with length of follow-up (p=0.0006), which fits what you would expect from a device that gets taken out.
• Starting weight shifts the decision. ESG performed relatively better in patients with a higher baseline BMI (p=0.0001), a usable criterion in clinic rather than just a statistic.
• Overall safety is broadly comparable. Total adverse event rates were comparable (p=0.20). What differs is the character of the problems: balloons tend toward intolerance and early removal, while for ESG the pooled serious adverse event rate was 2.2% in meta-analysis and 1.25% across 15,398 procedures in the IFSO review.

These figures describe study populations, not a forecast for any one person. Individual results may vary.

The honest point about balloons

A balloon has a legitimate place, with one condition worth understanding before you pay for it: it is a temporary device, and removal day is the day the assistance stops. If the months with the device in place are not used to build a different set of eating habits, weight commonly returns in part after removal. That is the practical explanation behind the finding that the gap between the two options widens over time.

The conclusion is not "avoid balloons". It is do not have a balloon without a plan for afterwards. If you choose one, ask on day one what happens after removal: how long follow-up continues, whether nutrition support is included, and what the next step is if weight starts to return.

Who a balloon suits better

• Not ready to commit to a lasting change, and wanting an option that is fully reversible.
• A smaller amount of excess weight, where the strongest available tool is not required, consistent with the finding that ESG's advantage grows with higher baseline BMI.
• A defined time frame, such as reducing weight to a threshold ahead of another planned treatment.
• Budget is a genuine constraint now, where a lower entry price means starting care sooner rather than waiting indefinitely.
• Wanting to test how you cope with a smaller stomach capacity before considering something longer-lasting.

Who ESG suits better

• Wanting a continuous effect with no device term to expire, and comfortable with a change that stays.
• A higher starting BMI, the group in which comparative research showed ESG performing relatively better (p=0.0001).
• Metabolic conditions that need time to improve, such as raised blood sugar, high blood pressure, abnormal lipids or fatty liver. In the MERIT trial, 80% of the ESG group had at least one metabolic comorbidity improve at 52 weeks, compared with 45% of controls.
• A history of temporary approaches followed by weight regain, where a tool that does not depend on a removal date makes more sense.
• Ready to attend follow-up throughout the first year, the period that makes the largest difference.

Both procedures sit within endoscopic bariatric and metabolic therapy, which ASGE and ESGE guidance recommends alongside lifestyle modification for adults with a BMI of 30 or above, or 27.0–29.9 with at least one obesity-related comorbidity. For detailed eligibility, see who ESG is suitable for.

Can you start with a balloon and move to ESG later?

Yes, and it is a recognised path. A balloon does not alter the structure of the stomach, so once removed it returns to its previous state and ESG can be considered later following assessment.

Two things are worth planning for. The first is total cost: a balloon followed by ESG means paying for two courses, not a discount on the second. If the goal is long-term from the outset, starting with ESG may work out better across the whole journey. The second is the condition of the stomach before ESG, reassessed each time, since inflammation or ulceration that develops while a device is in place needs treating first.

Cost, and planning the trip

At YOUNIFY, ESG is starting from THB 490,000 and the intragastric balloon is starting from THB 159,000. The gap reflects the single-use endoscopic suturing system, the largest single cost in ESG, and the different scope of care around each option. Compare total cost across the journey rather than the headline figure, since a balloon course always includes a removal procedure and still needs a plan after that. Full breakdown: ESG cost and what's included.

Logistics differ too. ESG is usually planned as a single trip covering assessment, procedure and early recovery, with later reviews arranged remotely. A balloon course involves two separate procedures, placement and removal, so a second trip or remote coordination needs budgeting from the start. Raise this before booking flights and our team will map the timeline with you.

In summary: four questions that decide it

• How long do you want the effect to last? If the answer is "as long as possible", ESG's five-year follow-up data speaks to that. If it is "a defined period", a balloon does its job.
• Where does your starting weight sit? The higher the baseline BMI, the more the comparative data leans toward ESG.
• Are you comfortable with a change that stays? If not yet, a balloon is the fully reversible route.
• What is the plan afterwards? Especially with a balloon. Without an answer here, the number on the quote tells you very little.

The clearest answer comes from assessment by the medical team, covering your history, comorbidities, a diagnostic gastroscopy and your own goals. For the longer view, read long-term results after ESG and obesity and weight management.