According to Gram Research analysis, a temporary stomach balloon helps people maintain weight loss better than counseling alone. In a 2026 randomized controlled trial of 107 adults, those with a balloon regained only 5.2% of their weight over 18 months, compared to 10.1% regain in the counseling-only group—roughly cutting weight regain in half. The balloon works by taking up stomach space, helping people feel fuller with smaller meals, though long-term benefits after balloon removal remain unclear.
A new study shows that adding a temporary stomach balloon to therapy and diet helps people maintain weight loss better than therapy alone. Researchers followed 107 adults who first lost weight through diet and counseling, then randomly gave some a balloon inserted in their stomach for a year while others continued with counseling only. After 18 months, people with the balloon regained less weight (5.2% gain) compared to those without it (10.1% gain). While the balloon provided modest benefits, researchers note that safety concerns exist and longer studies are needed to confirm lasting effects.
Key Statistics
A 2026 randomized controlled trial of 107 adults found that those using a temporary stomach balloon regained 5.2% of their weight over 18 months, compared to 10.1% regain in the counseling-only group, representing a 48% reduction in weight regain.
In the same study, 84.3% of adults with the stomach balloon maintained at least 5% weight loss after 18 months, compared to 63.6% in the counseling-only group, a difference of 20.7 percentage points.
Among study participants using the balloon, 70.6% successfully maintained at least 10% weight loss from their starting weight, compared to 45.5% in the group receiving counseling alone.
The 107 study participants initially lost an average of 18.7% of their total body weight during the first 6 months using low-calorie diet and group behavioral therapy before being randomly assigned to receive either a balloon or continued counseling.
The Quick Take
- What they studied: Whether adding a temporary balloon placed inside the stomach helps people keep weight off after they’ve already lost weight through diet and therapy.
- Who participated: 107 adults aged 30-65 years who were overweight (BMI between 32.5-45). All participants first completed 6 months of low-calorie diet and group counseling sessions where they lost an average of 18.7% of their body weight.
- Key finding: People with the stomach balloon regained only 5.2% of their weight over the next year, while those without the balloon regained 10.1%—meaning the balloon roughly cut weight regain in half.
- What it means for you: If you’ve successfully lost weight through diet and therapy but struggle to keep it off, a temporary stomach balloon might help you maintain your progress. However, this is a medical device with potential risks, so discuss it with your doctor to see if it’s appropriate for your situation.
The Research Details
This was a randomized controlled trial, which is considered one of the strongest types of research studies. Researchers enrolled 126 adults with obesity and had them all follow a low-calorie diet and attend group counseling sessions for 6 months. After this initial weight loss period, 107 participants were randomly divided into two groups: one group received a temporary balloon placed in their stomach for one year (while continuing counseling), and the other group continued with counseling alone.
The balloon is a soft, expandable device inserted through the mouth into the stomach using an endoscope (a thin camera). It takes up space in the stomach, helping people feel fuller with smaller meals. After one year, the balloon is removed. Researchers tracked weight changes, metabolic health markers, and quality of life for all participants over 18 months total.
This study design is strong because participants were randomly assigned to groups, reducing bias. However, participants and doctors knew who had the balloon (it wasn’t ‘blinded’), which could influence results.
Weight maintenance is one of the biggest challenges in obesity treatment. Many people can lose weight initially but struggle to keep it off long-term. This study specifically tested whether adding a mechanical tool (the balloon) to behavioral therapy could solve this problem. Understanding what helps people maintain weight loss is crucial because regaining weight leads to health problems returning.
This study has several strengths: it was randomized (reducing bias), had a reasonable sample size (107 participants), and followed people for 18 months. However, it has limitations: it was open-label (everyone knew who had the balloon), the follow-up period was relatively short for assessing long-term success, and the study didn’t compare the balloon to other weight-loss medications or procedures. The authors themselves noted that safety concerns remain and longer studies are needed.
What the Results Show
The main finding was clear: people with the stomach balloon regained significantly less weight than those without it. At the 18-month mark, the balloon group had regained 5.2% of their initial body weight, while the counseling-only group had regained 10.1%—nearly double the amount. This difference was statistically significant (p < 0.001), meaning it’s very unlikely to have occurred by chance.
When researchers looked at specific weight-loss thresholds, the results were even more striking. Among people with the balloon, 84.3% maintained at least a 5% weight loss from their starting weight, compared to only 63.6% in the counseling-only group. For the more ambitious goal of maintaining at least 10% weight loss, 70.6% of the balloon group succeeded versus 45.5% of the counseling group.
These findings suggest the balloon provides a meaningful advantage in preventing weight regain during the year it’s in place. The mechanism appears straightforward: by taking up space in the stomach, the balloon helps people feel satisfied with smaller portions, making it easier to stick to their diet.
Interestingly, when researchers measured metabolic health markers (like blood sugar, cholesterol, and inflammation), they found no significant differences between the two groups. Both groups showed similar improvements in these markers. Similarly, quality-of-life measures—how people felt physically and emotionally—showed no meaningful differences between groups. This suggests the balloon’s benefit is primarily mechanical (helping with portion control) rather than creating broader metabolic changes.
This research builds on existing knowledge that behavioral therapy and low-calorie diets produce good short-term weight loss but struggle with long-term maintenance. Previous studies have shown that intragastric balloons can help with initial weight loss, but this study is notable for testing whether they help maintain weight after the initial loss phase. The findings align with other research suggesting that combining behavioral approaches with mechanical aids may be more effective than either approach alone.
Several important limitations should be considered. First, the study only followed participants for 18 months total, with the balloon in place for 12 of those months. We don’t know what happens after the balloon is removed—do people maintain their weight, or does it return? Second, the study was open-label, meaning everyone knew who had the balloon, which could create placebo effects or bias. Third, the study didn’t compare the balloon to other weight-loss medications or procedures, so we can’t say if it’s better or worse than alternatives. Finally, the sample was relatively small and consisted mainly of middle-aged adults in a specific BMI range, so results may not apply to everyone.
The Bottom Line
For adults who have successfully lost weight through diet and behavioral therapy but struggle to maintain that loss, adding a temporary stomach balloon may help prevent weight regain. This recommendation has moderate confidence because the study showed clear benefits, but longer-term data is needed. The balloon should only be considered under medical supervision, as it carries risks including nausea, vomiting, and rare serious complications. It works best as part of a comprehensive program that includes ongoing behavioral support and dietary changes.
This research is most relevant for adults aged 30-65 with obesity (BMI 32.5-45) who have already lost weight and want help maintaining it. It may also interest healthcare providers treating obesity, researchers studying weight-loss interventions, and people considering weight-loss procedures. People with certain stomach conditions, severe reflux, or those unable to tolerate the balloon should not consider this option. Pregnant women and those with certain medical conditions should avoid this treatment.
Based on this study, people with the balloon showed weight maintenance benefits throughout the 12-month period it was in place. The real question is what happens after removal. The study didn’t follow people long enough to answer this. Realistic expectations: the balloon helps prevent regain while it’s in your stomach, but you’ll need to maintain the behavioral changes and dietary habits you learned to keep weight off after it’s removed.
Frequently Asked Questions
Does a stomach balloon help you keep weight off after you’ve already lost weight?
Research shows a temporary stomach balloon helps prevent weight regain. In a 2026 trial, people with balloons regained 5.2% of weight versus 10.1% without one. The balloon works by creating fullness with smaller meals, but benefits may not last after removal.
How much weight do people regain after using a stomach balloon?
In the study, people with balloons regained about 5% of their weight over 12 months while the balloon was in place. Those without balloons regained roughly 10%. Long-term regain after balloon removal wasn’t measured in this research.
Is a stomach balloon safe for weight maintenance?
The study showed weight benefits but noted safety concerns remain. Common side effects include nausea and vomiting. Serious complications are rare but possible. Any balloon treatment requires medical supervision and isn’t appropriate for everyone.
Can a stomach balloon replace diet and exercise for keeping weight off?
No. The balloon works best combined with behavioral therapy and dietary changes. In this study, all participants received counseling and maintained dietary habits. The balloon is a tool to support these behavioral changes, not a replacement for them.
How long does a stomach balloon stay in your stomach?
In this study, the balloon remained in place for 12 months, then was removed. The weight maintenance benefits were measured during this 12-month period. What happens after removal requires longer-term research.
Want to Apply This Research?
- Track weekly weight and weekly portion sizes (using photos or measurements) to monitor whether the balloon is helping you maintain your weight loss. Set a goal of maintaining within 5% of your post-diet weight, and log any weight increases above this threshold to identify patterns.
- Use the app to log daily meal portions and satiety levels (how full you feel after eating). With the balloon in place, you should notice feeling satisfied with smaller portions—track this to reinforce the behavioral changes that will help maintain weight after balloon removal.
- Create a long-term tracking plan that continues after balloon removal. Set monthly weight check-ins and quarterly reviews of eating habits and physical activity. Use the app to identify which behavioral strategies (meal planning, portion control, exercise) were most helpful during the balloon period, then intensify those strategies after removal to maintain results.
This research describes a medical device intervention that should only be considered under direct medical supervision. The intragastric balloon carries potential risks including nausea, vomiting, balloon deflation, and rare serious complications. This study was relatively short-term (18 months) and did not measure long-term outcomes after balloon removal. Results may not apply to all populations. Before considering balloon treatment, consult with a qualified healthcare provider to discuss whether it’s appropriate for your individual health situation, medical history, and weight-loss goals. This article is for educational purposes and should not replace professional medical advice.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.