Struggling with weight that doesn’t seem to budge? Concerned about obesity-related health problems? Bariatric surgery might be the right option for you. It’s a well-established medical solution that supports long-term weight loss and helps manage conditions like type 2 diabetes and high blood pressure. Many people also report feeling more confident and enjoying a better quality of life after surgery.
So, what types of bariatric surgery are available, and how do they work? In this guide, COS MEDCONNECT explains everything you need to know about bariatric surgery.
What is Bariatric Surgery?
What is bariatric surgery and how does bariatric surgery work? Bariatric surgery is a medical approach to weight loss that involves a range of surgical procedures. These procedures change the way your stomach and digestive system work to support long-term weight loss.
What is Bariatric Surgery?
Bariatric surgery works through three main mechanisms:
- Restriction: Smaller stomach means you feel full faster
- Malabsorption: Rerouted intestines absorb fewer calories/nutrients
- Hormonal/metabolic change: Reduced hunger hormones (ghrelin) + better insulin sensitivity
In Australia, common operations are gastric bypass and gastric sleeve; lap-band is now less recommended. According to ASMBS and Cleveland Clinic, surgery offers better long-term weight loss and comorbidity resolution than non-surgical care.
Types of Bariatric Surgery: Explained
Not all weight loss surgeries are the same, each comes with its own advantages and considerations. To help you make a well-informed decision, here’s an overview of the most common types of bariatric surgery.
Roux-en-Y Gastric Bypass
One of the most trusted weight loss surgery types is gastric bypass surgery, also known as the Roux-en-Y. It’s been safely performed for over 50 years and is often called the “gold standard” in bariatric care.
Roux-en-Y Gastric Bypass
How It Works
This surgery creates a small pouch from your stomach and reroutes the small bowel. That means:
- You eat less (your stomach holds less)
- Your body absorbs fewer calories and nutrients
- Hunger hormones shift, reducing appetite and helping you feel full sooner
This digestive re-routing also improves metabolism and supports major health changes. In fact, it’s one of the most effective options for reversing type 2 diabetes. Many people also notice relief from acid reflux after surgery.
Benefits
- Long-term, reliable weight loss
- May reverse health problems related to obesity
- Proven and widely practiced surgical method
Things to Consider
- More complex than gastric banding or sleeve gastrectomy
- Higher risk of vitamin and mineral deficiencies
- Possible risk of bowel issues or blockages
- Risk of ulcers (especially if smoking or taking NSAIDs)
- May cause “dumping syndrome”, nausea or discomfort after eating sugary or rich foods
Sleeve Gastrectomy (Gastric Sleeve)
Gastric sleeve surgery is one of the most popular options for weight loss. It involves removing around 80% of the stomach, leaving a slim, tube-like shape about the size of a banana.
Sleeve Gastrectomy
How It Works
With a smaller stomach, you feel full faster and eat less.
The part of the stomach that makes the hunger hormone (ghrelin) is also removed, so many people notice a drop in appetite and cravings.
Unlike gastric bypass, this procedure doesn’t touch the intestines. That means there’s less risk of nutrient malabsorption. Some people even find their food preferences change after surgery — a nice bonus!
Why People Choose It
- Less invasive than gastric bypass
- Lower risk of complications
- Shorter surgery and recovery time
- Can be used as a first step for patients with severe obesity
- Helps control weight and blood sugar
Things to Consider
- It’s a permanent (non-reversible) procedure
- May cause or worsen reflux or heartburn
- Has less effect on metabolism than bypass procedures
Insider tip: Not sure which surgery suits you better — sleeve gastrectomy or gastric bypass? Check out our simple comparison, designed to help you make an informed choice.
Adjustable Gastric Banding (Lap-Band)
Adjustable gastric banding is a type of weight loss surgery. A soft silicone band is placed around the top of your stomach to limit how much food you can eat.
It’s less invasive than other methods but has become less common in recent years due to slower results.
Adjustable Gastric Banding
How It Works
A silicone band is wrapped around the upper part of the stomach. This forms a small pouch, helping you feel full after eating a small amount.
The band’s tightness can be adjusted by injecting fluid into a small port under your skin. This controls how quickly food moves through the stomach.
Benefits
- Less invasive than other weight loss surgeries
- No cutting or stapling of the stomach or intestines
- You can usually go home the same day
- The band can be removed later if needed
- Fewer problems with vitamin and mineral deficiencies
Things to keep in mind
- Weight loss is slower and not as strong as with other surgeries
- You’ll need regular check-ups to adjust the band, especially in the first year
- The band can slip or irritate the stomach over time
- Some people develop trouble swallowing or issues with their oesophagus
- High chance of needing another operation later
Tip: Adjustable gastric banding may suit people who are highly committed and able to attend frequent follow-up visits. It’s reversible, but needs ongoing care.
Biliopancreatic Diversion with Duodenal Switch (BPD/DS)
BPD/DS is one of the most powerful types of weight loss surgery. It uses two methods — reducing the size of your stomach and rerouting part of your small intestine — to help people with severe obesity lose weight and improve their health.
Biliopancreatic Diversion with Duodenal Switch
How It Works
- Smaller stomach: Surgeons remove a large portion of your stomach, leaving a narrow “sleeve” that holds less food.
- Rerouted intestines: The small intestine is shortened so your body takes in fewer calories and nutrients from what you eat.
Together, this reduces hunger, boosts fullness, and improves blood sugar control.
Why People Choose BPD/DS
- Often leads to more weight loss than other surgeries
- Very effective for type 2 diabetes and related health issues
- Helps control appetite and reduce cravings in the long term
Things to Consider
- You’ll need lifelong supplements (vitamins and minerals)
- It’s a more complex surgery with a higher risk of side effects, like loose stools or nutrient issues
Insider tip: To get the most from this surgery, you’ll need to commit to ongoing medical care and long-term changes to how you eat and live.
SADI-S and Other Newer Procedures
SADI-S is one of the newest weight loss surgery types now recognised by experts. It’s a simpler version of the BPD-DS but still delivers powerful results. It combines a sleeve gastrectomy with a single intestinal reroute, meaning less surgical time and fewer complications.
SADI-S and Other Newer Procedures
How It Works
Your stomach is made smaller (like a banana), and food is rerouted to the latter part of your small intestine. This limits how much you eat and reduces how many calories and nutrients are absorbed. You’ll also feel full faster and less hungry overall.
Why People Choose SADI-S
- Great for long-term weight loss
- Helps with type 2 diabetes and blood sugar control
- Simpler than other complex bariatric surgery procedures (just one bowel connection)
- A good next step if you’ve already had a laparoscopic sleeve gastrectomy and need further results
Things to Keep in Mind
- As with other types of bariatric surgery, you may need lifelong vitamins
- It’s still a newer option, so we have less long-term data
- It may cause reflux or more frequent bowel movements in some people
While SADI-S is one of the newer procedures, there are a few other bariatric surgery options now being used more often.
One Anastomosis Gastric Bypass (OAGB)
Also called the “mini bypass,” this is a simpler form of gastric bypass. It uses just one connection between the stomach and intestine.
It’s quicker to perform than the classic method, yet still supports strong weight loss and better blood sugar control.
Sleeve Gastrectomy with Duodenal Switch (SG-DS)
This combines a laparoscopic sleeve with a shorter version of the duodenal switch.It gives similar benefits to the traditional BPD/DS but with fewer steps and risks.
These different kinds of bariatric surgery are still being studied long-term, but they offer solid choices for people who may not be suited to older methods.
Tip: Always talk with a bariatric surgeon to find the best fit for your goals and health.
Who Should (and Shouldn’t) Consider Bariatric Surgery?
Bariatric surgery is not for everyone. It depends on your health, weight, and readiness for long-term change. If diet and exercise haven’t worked, this could be an option to explore.
The candidate is considering bariatric surgery
Who Might Be a Good Fit? You may be a candidate if:
- Your BMI is 40 or more: That’s classed as severe obesity and carries high health risks.
- Your BMI is 35 or more, plus a related health condition: This could include type 2 diabetes, sleep apnoea, high blood pressure, or joint issues.
- You’ve tried other methods with no lasting results: If lifestyle changes alone haven’t helped, bariatric surgery options could offer the extra support needed.
If you’ve read this far and still feel unsure whether bariatric surgery is the right choice for you, don’t worry — we have a special article that can help clarify things: Should I Get Bariatric Surgery?
Who May Not Be Suitable (or Needs More Assessment) [H3]
- Serious unmanaged conditions (advanced heart failure, end-stage lung disease, active cancer)
- Under 18: Generally not performed; adolescents need specialist assessment
- Not ready for lifestyle changes (surgery isn’t a quick fix)
- Untreated mental health issues (depression, substance abuse, eating disorders)
- Pregnancy planning: Avoid surgery 12–18 months before/after
Bariatric Surgery in Vietnam: What You Need to Know
Struggling with severe obesity and feel like you’ve tried everything? Bariatric surgery could reset your health needs, and Vietnam is becoming a popular choice for Australians looking for safe, affordable care.
Why choose Vietnam for bariatric surgery?
Vietnam has modern, fully licensed private hospitals offering world-class procedures at much lower prices than in Australia. For example:
- Gastric sleeve surgery in Vietnam starts from $11,500 AUD, all-inclusive
- The same surgery in Australia can cost $25,000 to $30,000 AUD
That’s a huge saving, without compromising on safety or quality.
Bariatric Surgery in Vietnam
Through COS MEDCONNECT, you’ll be connected with:
- Accredited hospitals and clinics specialising in bariatric and cosmetic surgery
- Skilled surgeons and medical teams with international training
- English-speaking staff who support you before, during, and after your surgery
All facilities follow strict hygiene and safety protocols for peace of mind throughout your stay.
Whether you’re interested in gastric sleeve surgery or exploring other bariatric options, we’ll make the process simple, comfortable, and tailored to you. Check out our GASTRIC SLEEVE SURGERY IN VIETNAM
Contact COS MEDCONNECT today for a free consultation.
Bariatric surgery is a proven medical option to help improve health and quality of life for people living with obesity. While each type of surgery has its own benefits and risks, the key is to choose the most suitable solution, with the guidance of a qualified and trusted medical team. At COS MEDCONNECT, we hope this information has given you a clearer, more complete understanding of the available weight loss surgery options.
COS MEDCONNECT – Australia’s cosmetic surgery coordinator in Vietnam
Hotline: 1300 163 821
Website: cosmedconnect.com
Email: hello@cosmedconnect.com
Disclaimer:
The information provided in this blog is for general educational purposes only and is not intended as medical advice. All surgery carries risks and may not be suitable for everyone. Individual results vary, and outcomes depend on factors such as patient anatomy, surgical technique, lifestyle, and post-operative care.
Always consult with a qualified, board-certified plastic or cosmetic surgeon before making decisions about surgery. This blog does not replace a personalised consultation, medical assessment, or professional guidance tailored to your individual circumstances.
COS MEDCONNECT does not provide medical advice or perform surgical procedures. We coordinate cosmetic surgery and recovery services with third-party providers. All patients are encouraged to seek a second opinion from a qualified health practitioner before proceeding with any elective surgery.
Jane is the founder of COS MEDCONNECT. She enjoys sharing knowledge about cosmetic surgery and is passionate about helping people find trusted providers
