Gastric Balloon for Weight Loss

Introduction

A gastric balloon is a soft, temporary device placed inside the stomach to support weight loss. It is one of several non-surgical options that doctors now offer for people living with overweight and obesity, particularly those who do not want or do not qualify for bariatric surgery. The balloon does not cut, staple, or permanently change the stomach. It simply takes up space, helping you feel full on smaller meals while you work on long-term changes to eating and activity.

If your doctor has suggested a gastric balloon, or you are exploring it as a structured way to begin a medically supervised weight loss journey, this guide explains what to expect. It covers how the balloon works, the different types available, who tends to be a suitable candidate, what the placement and removal procedures involve, what recovery feels like, the typical weight loss results, possible side effects, and how the balloon compares with other options.

The gastric balloon is best understood as a tool that supports behaviour change, not a stand-alone cure for obesity. The results you achieve depend heavily on how you use the months the balloon is in place to build new habits that last after it is removed.

What Is a Gastric Balloon?

A gastric balloon, also called an intragastric balloon or weight loss balloon, is a soft silicone device placed inside the stomach through the mouth. Once it is in position, it is filled with sterile salt water (saline) or, in some designs, with gas. The filled balloon occupies part of the stomach, leaving less room for food.

Key features of the gastric balloon include:

• Non-surgical: placed and removed through the mouth using a flexible camera (endoscope). There are no incisions in the abdomen.
• Temporary: the balloon is designed to stay in the stomach for a defined period, usually 6 to 12 months, and must then be removed.
• Reversible: the stomach itself is not altered. Once the balloon is taken out, the anatomy returns to its original state.
• Restrictive in mechanism: the balloon does not change how food is digested or absorbed. It works by taking up space so meals feel filling sooner.

Because the gastric balloon does not change digestion, it works alongside — not instead of — the work you put into diet, activity, sleep, and behaviour change. Most clinical programmes pair the balloon with a structured nutrition and lifestyle support plan during and after the months it is in place.

How a Gastric Balloon Works

The science behind the gastric balloon is straightforward. When the balloon occupies part of the stomach, three things tend to happen together:

• Smaller meals feel filling. Because the stomach has less available space, even modest portions trigger the stretch signals that tell the brain you have eaten enough.
• Stomach emptying slows. Food moves more gradually out of the stomach, so the feeling of fullness lasts longer between meals.
• Hunger signals shift. Studies suggest that the presence of a balloon can influence appetite-regulating hormones, which may reduce the intensity of hunger between meals for some patients.

Cross-section of the stomach showing: ① the gastric balloon occupying upper stomach space, ② remaining stomach capacity available for food, ③ the stomach wall, ④ the lower oesophageal sphincter above the balloon.

*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.

Together, these effects make it easier to eat less without the constant battle against hunger that many people experience when they try to cut calories on their own. The aim during the months the balloon is in place is to use this easier window to relearn portion sizes, build a more protein-focused eating pattern, and establish a sustainable activity routine. The behavioural changes that take root during those months are what carry the weight loss forward after the balloon is removed.

Types of Gastric Balloon

Several gastric balloon systems are used around the world. Availability varies by country and clinic. The main categories are described below. The choice between them depends on the system your treating team works with, your medical history, and what your doctor judges to be appropriate.

Single fluid-filled balloon

The most widely studied design is a single silicone balloon that is placed empty using an endoscope and then filled with sterile saline once it is in the stomach. A small amount of coloured dye is often added to the saline so that any leak can be detected through a colour change in the urine. This style of balloon is typically kept in place for around six months.

Adjustable balloon

Some balloons are designed to allow the doctor to adjust the volume after placement. If side effects are difficult to tolerate at the original volume, the balloon can be partly deflated. If weight loss has stalled, the volume can be increased. This type of balloon is often approved for a longer dwell time, in the range of up to 12 months.

Swallowable gas-filled balloon

In some systems, the balloon comes inside a capsule that you swallow. Once it reaches the stomach, the balloon is inflated with gas through a thin tube and the tube is then removed. Several capsules may be swallowed over the treatment course. These balloons are typically used in a programme lasting around six months and are removed using endoscopy.

Procedureless or transit balloons

Newer designs have explored balloons that do not require endoscopy for placement or removal, deflating on their own after a set period so they can pass naturally. Availability of these designs varies, and not all systems are offered in every country. Your treating team will tell you which balloon systems they use and why.

The three main gastric balloon designs: ① single fluid-filled silicone balloon, ② adjustable balloon with fill-port valve, ③ swallowable capsule-based balloon.

*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.

Who Is a Candidate for a Gastric Balloon?

The gastric balloon is generally considered for adults living with overweight or obesity who have not achieved meaningful weight loss through diet, activity, and behavioural support alone, and who want a non-surgical option. Specific eligibility depends on the balloon system and on local medical practice, but the broad picture is as follows.

People who may be suitable

• Adults with a body mass index (BMI) typically in the range of about 27 to 40, depending on the balloon system and clinical judgment
• People who have tried structured diet and exercise programmes without lasting success
• People who do not meet the criteria for bariatric surgery, or who prefer a temporary and reversible option
• People with weight-related health problems — such as high blood pressure, type 2 diabetes, fatty liver, or joint pain — where moderate weight loss is expected to bring meaningful health benefit
• People who are willing and able to commit to the dietary and behavioural programme that supports balloon therapy

People for whom the balloon is generally not suitable

• Previous major stomach or upper gastrointestinal surgery
• Large hiatal hernia (where part of the stomach pushes into the chest)
• Active stomach or duodenal ulcers, or significant inflammation of the stomach lining
• Severe acid reflux disease
• Known or suspected bleeding disorders of the upper digestive tract
• Pregnancy, breastfeeding, or planned pregnancy during the treatment period
• Certain psychiatric conditions, untreated eating disorders, or active substance use disorders where the team feels balloon therapy would not be safe or effective
• Long-term use of medications that increase bleeding risk, unless this can be safely managed around the procedure

A medical evaluation before the procedure is essential. This usually involves a detailed history, blood tests, and sometimes an endoscopy of the stomach to look for hernias, ulcers, or inflammation that would need to be treated first.

Alternatives to Consider

The gastric balloon is one option within a wider menu of obesity treatments. Major societies, including the American Gastroenterological Association and obesity medicine bodies, recommend that treatment decisions weigh several pathways together rather than jumping to any single approach. Common alternatives include the following.

Structured lifestyle and behavioural programmes

Intensive dietary, exercise, and behavioural support — ideally delivered by a multidisciplinary team — remains the foundation of obesity treatment. For some patients, this is enough. For others, it provides a launch point for more intensive treatment if needed.

Anti-obesity medications

Over the past few years, the medical landscape for obesity has shifted significantly with the wider availability of GLP-1 receptor agonist medications such as semaglutide and tirzepatide. These injectable medications have produced substantial weight loss in clinical trials and have changed how many specialists think about non-surgical treatment. Whether they are appropriate, available, and affordable in your situation is a discussion to have with your treating team. They are typically used long-term, and weight tends to return if they are stopped without other supports in place.

Endoscopic sleeve gastroplasty (ESG)

This is another endoscopic, non-surgical procedure in which the stomach is folded inward and stitched from inside to create a smaller, sleeve-shaped pouch. It produces more weight loss than the balloon in clinical studies and lasts longer, though it is more involved and not fully reversible.

Bariatric surgery

For people with more severe obesity, or with obesity plus serious related conditions, bariatric surgery — including sleeve gastrectomy and gastric bypass — produces the largest and most durable weight loss of any current treatment. Surgery involves permanent changes to the anatomy and carries surgical risks, but it has decades of evidence behind it.

The gastric balloon sits between intensive lifestyle therapy and these more involved options. It can be the right starting point for someone who wants a structured, time-limited push to change habits, or for someone who is not ready for or eligible for surgery. The best fit for you is a conversation with a doctor who can weigh your weight, your health conditions, your goals, and your preferences together.

Spectrum of obesity treatment options from least to most invasive: ① lifestyle and behavioural programme, ② anti-obesity medications, ③ gastric balloon, ④ endoscopic sleeve gastroplasty, ⑤ bariatric surgery.

*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.

Preparing for the Gastric Balloon Procedure

Preparation for a gastric balloon usually takes place over a few weeks. The exact protocol varies by clinic, but most programmes share the following elements.

Medical evaluation

Before the procedure, you will typically have:

• A detailed medical history and physical examination
• Blood tests to check general health, liver and kidney function, and blood sugar
• Screening for thyroid disorders or other treatable causes of weight gain
• An upper endoscopy in some cases, to check the stomach is suitable
• A review of medications, particularly anything that affects bleeding or stomach acid
• A nutrition assessment, and sometimes a psychological assessment, depending on the programme

Dietary preparation

In the days leading up to placement, you will usually be asked to switch to a light diet, then to clear liquids, and finally to fast for several hours before the procedure. This helps ensure the stomach is empty and the placement is safe.

Medication adjustments

Your treating team will give specific instructions about medications. Blood thinners, anti-inflammatory painkillers, and certain diabetes medications may need to be adjusted around the procedure. Always follow your team’s written instructions rather than making changes on your own.

Mental and practical preparation

It helps to plan for the first week after placement. Most people experience a few days of nausea, cramping, and discomfort as the stomach adjusts to the balloon. Time off work, easy access to fluids, and prescribed anti-nausea medication make this easier. Arranging a friend or family member to accompany you on the day of the procedure is standard, as you will have received sedation and should not drive.

What Happens During Placement

Gastric balloon placement is usually a day-care procedure. You arrive at the hospital or endoscopy unit having fasted, change into a gown, and meet the endoscopy and anaesthesia team.

Step by step

1. You are positioned on your side on the endoscopy table and given sedation through a vein. Most clinics use deep sedation rather than general anaesthesia. You will not be aware of the procedure.
2. The doctor passes a thin, flexible tube with a camera (endoscope) through the mouth, down the food pipe, and into the stomach.
3. The stomach is examined carefully to confirm there is no hernia, ulcer, or other problem that would prevent safe balloon placement.
4. The deflated balloon is then passed into the stomach. With a swallowable design, you swallow the capsule before the endoscopy stage, and the doctor confirms its position.
5. The balloon is filled with sterile saline or gas through a thin filling tube.
6. Once the balloon is fully inflated, the filling tube is detached and the endoscope is withdrawn.

Gastric balloon placement procedure: ① sedation administered, ② endoscope advanced through mouth into stomach, ③ stomach examined for safety, ④ deflated balloon passed into stomach, ⑤ balloon inflated with saline, ⑥ filling tube detached and endoscope withdrawn.

Post-placement recovery stages: ① days 1–3, clear liquids and anti-nausea medication; ② days 3–7, soft foods introduced as symptoms settle; ③ week 2 onward, normal textures reintroduced with small portions.

*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.

The first few days after placement are usually the most uncomfortable part of the experience. The stomach reacts to the new object inside it, and nausea, cramping, and a feeling of fullness are common.

Typical pattern

• Days 1 to 3: nausea, vomiting, and abdominal cramping are common. Most people stay on clear liquids and take prescribed anti-nausea medication. Rest is appropriate.
• Days 3 to 7: symptoms gradually settle. Most people transition to soft foods such as soups, yoghurt, scrambled eggs, and well-cooked vegetables.
• Week 2 onward: normal textures of food are reintroduced, with attention to small portions, slow eating, and good chewing.

If nausea or vomiting is severe or persistent, or if you cannot keep down fluids, contact your treating team. Dehydration is the main concern in the early days and can usually be managed with medication adjustments and, occasionally, a short hospital stay for fluids.

Life with a Gastric Balloon

Once the early adjustment passes, daily life with a gastric balloon settles into a new pattern. Most people return to work within a week and can resume normal activities, including travel and exercise, in the weeks that follow.

Eating patterns

• Smaller meals: portions are typically a fraction of what they were before
• Slow, mindful eating: chewing well and eating slowly reduces the risk of nausea
• Protein focus: most programmes recommend prioritising protein-rich foods to protect muscle and support satiety
• Hydration: drinking water steadily through the day matters, but most people are advised not to drink large volumes with meals
• Avoiding carbonated drinks and very sugary foods, which can cause discomfort

Activity

Light activity is usually encouraged within a few days of placement. Structured exercise, including walking, swimming, and resistance training, is reintroduced gradually. The balloon does not stop you from being active — in fact, the months it is in place are an opportunity to build a routine that will be much easier to maintain afterwards.

Follow-up

Most gastric balloon programmes include regular follow-up appointments with a dietitian or weight management team. These visits are central to the results you achieve. They help you adjust your eating, problem-solve setbacks, and use the months of easier appetite control to build durable habits.

Removal of the Balloon

The gastric balloon must be removed at the end of the planned treatment period — usually six months for standard balloons and up to twelve months for adjustable systems. Leaving the balloon in place beyond its approved dwell time increases the risk of deflation, leakage, and other complications.

How removal is done

Removal is also an endoscopic, day-care procedure done under sedation. The endoscope is passed into the stomach, the balloon is deflated using a needle and suction, and the empty balloon is then grasped and pulled out through the mouth. The whole procedure typically takes 20 to 30 minutes. After a short recovery period, you go home the same day.

You will usually be on liquids for a day or two after removal before returning to normal eating. Many people notice that hunger returns more strongly once the balloon is out, which makes the lifestyle work done during the treatment period especially important.

Expected Results

Weight loss with a gastric balloon varies widely between individuals and depends heavily on the lifestyle work done alongside it.

What clinical studies show

• Average total body weight loss in studies tends to fall in the range of about 10 to 15 percent over the months the balloon is in place
• Most of the weight loss happens in the first three to four months, when satiety effects are strongest
• Weight loss tends to plateau in the later months, even though the balloon is still in place
• Long-term results depend largely on what happens after removal. Some people maintain their loss; others regain part or all of it, particularly if behavioural changes were not consolidated

Health improvements alongside weight loss

Even modest weight loss can bring measurable health benefits, including improvements in blood pressure, blood sugar control in type 2 diabetes, fatty liver, sleep apnoea, joint pain, and overall fitness. Your treating team will track your weight-related conditions during and after balloon therapy and adjust medications as needed.

Your specialist is the best person to give you a personalised estimate of what to expect. National averages are useful background, but individual results vary based on your starting weight, your health, and how you use the treatment window.

Risks and Side Effects

The gastric balloon has a generally favourable safety profile compared with bariatric surgery, but it is not risk-free. Understanding the possible side effects and complications is part of giving informed consent.

Common side effects

Nearly everyone experiences some of these, particularly in the first one to two weeks:

• Nausea and vomiting
• Abdominal cramping and discomfort
• Acid reflux or heartburn
• A sensation of bloating or fullness
• Tiredness, especially in the early days when intake is low

These usually settle with anti-nausea medication, acid-reducing medication, and time. Most clinics provide a standard set of medications to take during the first week or two.

Less common complications

• Persistent intolerance: a small proportion of people simply cannot tolerate the balloon and request early removal. This is usually safe and is part of the contract of treatment.
• Balloon deflation: uncommon, but the balloon can lose volume. In fluid-filled balloons, the dye in the saline causes urine to turn green or blue, which is the signal to contact your team urgently.
• Balloon migration: if a deflated balloon moves into the intestine, it can rarely cause a blockage that may need endoscopic or surgical removal.
• Stomach ulcers or erosions: long-term contact between the balloon and the stomach wall can occasionally cause ulcers; acid-suppressing medication during the treatment period reduces this risk.
• Severe acid reflux: some people develop reflux that requires ongoing medication.
• Dehydration: from persistent vomiting in the early days. This usually responds to medication adjustment but occasionally needs intravenous fluids.
• Pancreatitis: rare cases of inflammation of the pancreas have been described and may require balloon removal.
• Bleeding or perforation: very rare, and related to the endoscopic procedure itself.

Serious complications are uncommon when the balloon is placed by a trained endoscopist working within a structured bariatric programme that includes proper follow-up. Knowing the warning signs — severe abdominal pain, persistent vomiting, change in urine colour, or fever — and having a clear route to contact the team if they occur is part of safe care.

Life After the Balloon

The most honest message about the gastric balloon is that the balloon itself is the easier part. The harder and more important work begins after the balloon comes out.

The post-balloon window

In the weeks after removal, hunger usually returns more strongly. Without the physical fullness of the balloon, it is easy to slip back into older eating patterns. Most programmes plan structured follow-up for at least a year after removal, including dietitian support, weight tracking, and sometimes psychological support.

Sustaining weight loss

The behaviours that protect weight loss after the balloon is removed are well-established and apply to all forms of weight loss treatment:

• A protein-focused eating pattern with plenty of vegetables and limited ultra-processed foods
• Regular physical activity, including both aerobic and resistance training
• Adequate sleep and stress management
• Regular self-monitoring of weight and habits
• Ongoing engagement with a clinical team rather than going it alone

If weight returns

Some weight regain is common and does not mean failure. If significant regain occurs, your team can discuss the next step, which may include another balloon, medication, endoscopic sleeve gastroplasty, or bariatric surgery. Obesity is a chronic condition, and long-term treatment plans often involve combining or sequencing different approaches over time.

Choosing a Programme

Because the gastric balloon’s success depends so heavily on the surrounding programme, looking for a well-organised bariatric service is at least as important as choosing the balloon system. Things that signal a strong programme include:

• An experienced endoscopist who performs the procedure regularly
• A multidisciplinary team that includes a bariatric physician or surgeon, a dietitian, and ideally a psychologist or counsellor
• Clear written information on the procedure, side effects, and what to expect
• A structured follow-up plan, both during the months the balloon is in place and for at least a year after removal
• A clear plan for what happens if you cannot tolerate the balloon or if complications occur
• Honest framing of expected results and the work involved, rather than promises of effortless weight loss

Frequently Asked Questions

Is the gastric balloon safe?

For appropriately selected patients, the gastric balloon has a generally favourable safety profile compared with bariatric surgery. Serious complications are uncommon when placement is done by a trained endoscopist with proper follow-up. Most people experience temporary side effects such as nausea and cramping in the first week or two; persistent or serious complications are rarer but possible.

How much weight can I expect to lose?

Clinical studies suggest an average total body weight loss of around 10 to 15 percent over the months the balloon is in place. Individual results vary widely based on starting weight, health conditions, and — most importantly — how the treatment window is used. Your treating team can give you a more personalised estimate.

Can I get a gastric balloon if I do not qualify for bariatric surgery?

Yes. The gastric balloon is often considered for people with a BMI in a range that is below the usual threshold for bariatric surgery, or for people who meet surgical criteria but prefer a non-surgical, reversible option. Eligibility is a clinical decision based on your weight, health, and history.

Will I regain the weight after the balloon is removed?

Some weight regain is common, particularly if behavioural changes have not been consolidated. Long-term results depend on continued lifestyle work after removal and on the structured follow-up provided by your programme. The balloon is best thought of as a tool that gives you an easier window to change habits, not a permanent fix.

Is the procedure painful?

Placement is done under sedation, so you will not feel the procedure itself. The first few days afterwards typically involve cramping, nausea, and discomfort, which improve with medication and time.

Can I exercise with a gastric balloon in place?

Yes. Light activity is encouraged in the first week, and structured exercise is reintroduced gradually. Many people use the months with the balloon to establish an activity routine they can continue afterwards.

What happens if I cannot tolerate the balloon?

A small proportion of people request early removal because of persistent nausea, vomiting, or reflux. Early removal is a recognised part of treatment and is usually straightforward.

How is the gastric balloon different from anti-obesity medications such as GLP-1 drugs?

Both are non-surgical options for obesity, but they work differently. The balloon is a physical device that acts on stomach volume and emptying for a defined treatment period. GLP-1 medications act on appetite-regulating hormones and are taken long term. Each has its own profile of benefits, side effects, and trade-offs, and they are sometimes considered together or sequentially as part of an overall plan.

Can the balloon be repeated?

Yes. In some cases, a second balloon can be placed after a break following removal of the first. Whether this is appropriate depends on the response to the first balloon, your overall plan, and your treating team’s judgment.

Conclusion

The gastric balloon offers a structured, non-surgical, reversible way to begin a serious effort at weight loss. It does not change the anatomy of the stomach or interfere with digestion. Instead, it gives you a defined period — usually six to twelve months — during which appetite is easier to manage, portions feel naturally smaller, and the work of building new eating and activity patterns is more manageable.

The balloon is not a stand-alone solution. The lifestyle programme around it, the strength of your follow-up team, and the habits you build during the treatment window are what determine how much weight you lose and how much of that loss you keep. For the right person, supported by the right team, the gastric balloon can be a valuable step in a longer journey of treating obesity as the chronic condition it is.