Differences Between Gastric Sleeve and Bypass: Explained

Gastric Sleeve vs. Bypass new

When your weight threatens your health and all your attempts to lose it have failed, bariatric surgery could be the next step.

Bariatric surgeries change how your digestive system works, mainly the stomach. The two common types are gastric sleeve and gastric bypass surgery, both known as weight loss surgery.

Although both aim to help with weight loss, they have distinct differences. Let’s compare gastric sleeve vs. gastric bypass procedures so you can discuss your options with your doctor better.

Gastric Sleeve vs. Bypass Surgery – The Similarities

Both surgeries alter your stomach size by shrinking it to the size of a small pouch. A smaller stomach area means you will feel full of much less food. Smaller stomachs also result in less ghrelin – the hormone responsible for feelings of hunger.

The difference between the two surgeries lies in how they create a smaller stomach pouch.

Read Also: What Is Gastric Sleeve Diet

How They Modify Stomach Size

How-They-Modify-Stomach-Size Gastric Sleeve Vs Gastric Bypass

Gastric sleeve surgery reduces the stomach size by about 80%, aiding weight loss. Typically minimally invasive and involves small incisions and a laparoscope.

  • Process:
  1. Surgeons perform keyhole surgery, making small incisions.
  2. They insert a thin tube with a camera and surgical tools for precise work.
  3. The surgeon conducts the surgery under general anesthesia with a ventilator.
  4. The stomach is divided, retaining 20% and removing 80%.
  5. The surgeon removes the extra stomach material. Surgeons sew the remaining stomach together to create a smaller, tube-shaped stomach. This new stomach, known as a gastric sleeve, is approximately 25% of its original size.

Gastric bypass creates a small stomach pouch and redirects part of the stomach and small intestine, reducing fat absorption.

  • Process:
  1. The surgeon creates a small stomach pouch and directly connects it to the small intestine.
  2. This bypasses the duodenum, decreasing fat absorption.
  3. The procedure can be minimally invasive or require open surgery.

Read Also: Requirements For Gastric Bypass Surgery

Results & Benefits

Both gastric bypass and gastric sleeve surgeries offer substantial weight loss and health improvements. Here are the benefits and outcomes of each:

Gastric Bypass:

Gastric-Bypass-vs.-Gastric-Sleeve-Results-and-Benefits bdw nj

  • Weight Loss: Patients shed 60-80% of excess weight in the first year.
  • Health Benefits: Improves conditions such as type 2 diabetes, high blood pressure, sleep apnea, and high cholesterol.
  • Rapid Results: Quick weight loss motivates healthier habits.
  • Enhanced Life Quality: Boosts energy, mobility, and confidence.
  • Long-Term Success: Studies show sustained weight loss for up to 10 years after surgery.

Gastric Sleeve:

  • Weight Reduction: Patients typically lose 50-70% of excess weight in the first year.
  • Health Benefits: Addresses conditions like type 2 diabetes, high blood pressure, sleep apnea, and high cholesterol.
  • Fewer Complications: Simplified procedure with lower risks compared to gastric bypass.
  • Lower Chance of Deficiencies: Taking supplements and following a specific diet can help reduce the risk of deficiencies.”
  • Patients can maintain weight loss for up to 5 years after surgery, ensuring long-term stability.

Read Also: duodenal Switch vs Roux-en-y Suregry

Patient's Reviews

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Risks & Complications

Most surgeries, including weight loss procedures, carry risks and potential complications. Here’s what you need to know about possible issues with two common types of weight loss surgeries:

Gastric Sleeve:

  • Acid reflux
  • Stomach fluid leakage
  • Stomach obstruction
  • Narrowing of the stomach pouch

Gastric Bypass:

  • Stomach ulcers
  • Increased sensitivity to alcohol
  • Stomach perforations
  • Bowel obstructions

Gastric Bypass Surgery Vs. Sleeve Recovery Times

Gastric Bypass Surgery Vs. Sleeve Recovery Times mnb

  • Gastric Sleeve:
  1. Single operation.
  2. Typically completed using a laparoscope.
  3. Hospital stay of 1-2 days.
  4. Possibility of extended stay if experiencing significant pain.
  • Gastric Bypass:
  1. Two-step surgery is more complex.
  2. It can be done with a laparoscope.
  3. A hospital stay of at least 2 days is often longer because of complexity.
  4. Open surgery may require 4-5 days in the hospital because of larger incisions.

Gastric Sleeve Vs Gastric Bypass pros and cons

Each type of surgery has pros and cons, which can help you decide what will work best for your situation.

Gastric Sleeve

Gastric sleeve surgery patients often lose 65% of their excess body weight. The surgeon completes the surgery in one sitting, so there is less risk of complications. Recovery is faster, and patients can absorb more minerals and nutrients than gastric bypass patients.

Some main drawbacks of gastric sleeves are slower weight loss, irreversibility, and the risk of acid reflux.

Gastric Bypass

Bypass patients often lose up to 80% of their excess body weight because the stomach does not absorb as many calories. Weight loss is also more rapid than possible with a gastric sleeve. While the surgery is difficult to reverse, it’s not impossible.

Surgeons perform gastric bypasses in two steps. First, there is more risk, and the recovery period is longer. There is also the risk of dietary deficiencies because of malabsorption.

Read also: Intragastric Balloon Weight Loss

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Gastric Sleeve vs. bypass cost

cost-and-price-2024 Gastric Sleeve vs. bypass cost

The cost of this procedure can vary based on the location of the hospital and the surgeon’s experience. The price may differ from one hospital to another. Similarly, the surgeon’s expertise can also impact the overall cost. Important to note that in some places, the cost may only cover certain fees, such as aftercare and anesthesia.

For instance, gastric bypass surgery typically ranges from £8,000 to £15,000, while sleeve gastrectomy costs £8,000 to £10,000. In the USA, according to the National Health Service (NHS), sleeve gastrectomy costs about $17,500, and gastric bypass around $27,000, as stated on MultiCare’s website.

While the price of gastric sleeve in Turkey range between €2200 – €3200 and bypass between €2500 – €3500

Operation TypeTurkeyUnited KingdomUnited States
Gastric Sleeve€2200 – €3200£8,000 – £15,000$17,500
Gastric Bypass€2500 – €3500£8,000 – £10,000$27,000

Gastric Bypass vs Sleeve long-term

Gastric Sleeve:

  • Weight Loss: Typically results in significant weight loss, usually around 60-70% of excess body weight.
  • Nutrient Absorption: Generally maintains better nutrient absorption than gastric bypass since it doesn’t change the natural food pathway.
  • Simplicity: A simpler procedure with fewer long-term complications related to rerouting the digestive tract.
  • Diet: Easier to transition to a regular diet over time.

Gastric Bypass:

  • Weight Loss: Also leads to substantial weight loss, usually around 70-80% of excess body weight.
  • Nutrient Absorption: This can cause malabsorption of certain nutrients, requiring lifelong supplementation.
  • Complexity: More complex because of rerouting of the digestive system, which may lead to more long-term complications.
  • Diet: Follows a similar dietary progression to gastric sleeve but requires extra attention to prevent nutritional deficiencies.

Gastric bypass surgery vs sleeve: Diabetes Management

Both gastric bypass and gastric sleeve surgeries effectively manage type 2 diabetes, but they have different mechanisms and outcomes:

Gastric Bypass:

  • How it works: It helps you eat less by making your stomach smaller and changing how your body digests food. This also affects hormones in your gut, like GLP-1, which helps control your blood sugar levels.”
  • Diabetes Improvement: Often results in rapid and significant improvement in blood sugar control, with some experiencing diabetes remission shortly after surgery.
  • Long-Term Control: Many see long-term improvements in diabetes control, though the extent varies.

Gastric Sleeve:

  • Mechanism: Primarily restricts food intake by reducing stomach size. While it doesn’t reroute the digestive tract, it can still affect gut hormones, possibly improving blood sugar control.
  • Diabetes Improvement: This can significantly improve diabetes control, though not as quickly or prominently as gastric bypass.
  • Long-Term Control: Effective for many, but not as consistent or potent as with gastric bypass.

Gastric sleeve or bypass: which is better

Choosing between gastric sleeve and gastric bypass depends on factors like your health, weight loss goals, and preferences. Gastric sleeve surgery makes the stomach smaller by removing a part. Gastric bypass surgery changes the digestive system to control the amount of food that the body consumes and absorbs.

Gastric band vs. sleeve

Gastric Band:

  • Surgeons place an adjustable band around the top of the stomach to reduce food intake.
  • The procedure is adjustable and reversible, giving surgeons control over food intake.
  • Usually less invasive than sleeve gastrectomy.

Sleeve Gastrectomy:

  • During surgery, doctors remove a large part of the stomach. This helps reduce hunger by getting rid of the section that produces the hunger hormone ghrelin.
  • It’s a permanent procedure effective for weight loss and improving obesity-related health conditions like diabetes and high blood pressure.


Gastric band vs. sleeve new f

  • Effectiveness: Sleeve gastrectomy usually results in greater weight loss than gastric banding.
  • Surgical Complexity: Gastric banding is less invasive and reversible, while sleeve gastrectomy is permanent and more complex.
  • Sleeve gastrectomy reduces hunger by removing the part of the stomach that produces the hunger hormone. Gastric banding limits food intake by making the stomach smaller, helping with hunger control.
  • Adjustability: Gastric banding allows for adjusting food intake levels, while sleeve gastrectomy doesn’t offer this.
  • Health Benefits: Both surgeries can improve health issues related to severe obesity. Sleeve gastrectomy may be more effective in promoting weight loss.


In recent times, Istanbul has emerged as a top choice for people seeking medical services globally. This is because of the affordable prices, skilled doctors, and specialized medical care available.

At HayatMed, we offer fully inclusive fee packages. These packages cover all services related to the surgery, including hospital charges, surgeons’ and anesthetists’ fees, and aftercare policies.

Gastric Sleeve Vs Gastric Bypass FAQs

Both gastric bypass and sleeve gastrectomy can lead to significant weight loss and improved health in obese individuals. Gastric bypass may result in faster weight loss, while sleeve gastrectomy is less invasive. Success depends on post-surgery lifestyle changes and individual health factors. Both procedures effectively address obesity-related health conditions.

Yes, gastric bypass surgery is generally considered more serious than its less invasive counterpart, gastric sleeve surgery. Gastric bypass requires reconstructing part of the digestive system in order to realign with eating patterns, while the latter merely involves the removal of part of the stomach.

Safety concerns regarding weight loss surgery depend on individual circumstances. Gastric sleeve surgery may be safer due to its lower risk of complications; however, the best choice should always be determined through consultation with healthcare providers.

Choice between gastric sleeve and bypass procedures depends on an individual’s goals, health conditions and preferences. Gastric sleeve is less invasive and has lower risks of complications while gastric bypass may initially produce greater weight loss – although what constitutes “the better option” will vary from person to person.

Recovery time following gastric sleeve surgery tends to be shorter than for gastric bypass procedures, with patients recovering and returning to regular activities within weeks following sleeve gastrectomy surgery, while gastric bypass may take more time for recovery.

Gastric bypass may offer more significant initial weight loss and may help manage certain health conditions like type 2 diabetes more effectively, but is more complex surgery with potential long-term nutritional concerns; its potential advantages depend on each person’s individual circumstances and needs.

People often opt for sleeve gastrectomy over gastric bypass for various reasons, including its less invasive nature, shorter recovery time and lower risk of complications. Furthermore, many prefer its straightforward process and lower likelihood of nutritional deficiencies; personal preferences and medical assessments play a large part in this decision-making.

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This article was Medically reviewed by Dr. Hakan Evrüke

About the author

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Zeyna Aslan

Zeyna Aslan, a medical writer at Hayatmed Clinic, brings 13 years of experience in the field. She excels in creating clear, engaging content that educates and informs. Zeyna's expertise spans across plastic surgery and hair transplant procedures. Her work helps potential patients understand their options and make informed decisions. At Hayatmed Clinic, Zeyna's dedication to quality content plays a vital role in converting visitors into satisfied patients. see profile on linkedin


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