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ObesityNovember 2021Summary reviewed June 2026

What the SABO Trial Found — Adjustable Balloon for Obesity

Researchers tested a stomach balloon that can be adjusted in size to help people lose weight. After 32 weeks, people with the balloon lost an average of 15% of their body weight, compared to 3% in those who only changed their diet and exercise habits.

What the trial was testing

The SABO enrolled 288 patients with obesity. The study was sponsored by Spatz FGIA, Inc and tracked outcomes across the full group of patients who matched the trial's eligibility profile.

Researchers followed patients through treatment and into recovery, tracking the outcomes that mattered most for the disease being studied.

What the results showed

People with the adjustable balloon lost 15% of their body weight on average over 32 weeks.

Lancet (London, England) · 2021 · NCT02812160

These findings — that people lost 15% of their weight with the balloon versus 3% with lifestyle changes alone — were published in the Lancet (London, England) and represent the headline result of the study.

Researchers tracked outcomes across 288 patients enrolled in the trial. The result was consistent enough across the group that the team felt confident reporting it.

What this means for patients

For patients with obesity, this result changes the calculus on what to ask their care team about. Whether it changes day-to-day care depends on factors like disease subtype, prior treatments, and where the patient is in their care journey.

What you can do now

This adjustable stomach balloon is FDA-approved and available now. The balloon stays in your stomach for about 8 months and can be made larger or smaller through a quick procedure. Talk to your doctor about whether this option fits your weight loss goals.

Eligibility for the treatments mentioned above depends on specific test results and clinical history. Bring this summary, the trial name, and your most recent labs or pathology report to your next visit.