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Gastric Bypass versus Gastric Sleeve

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What is a gastric bypass?

It is a bariatric surgery that creates a small pouch from the stomach and connects the newly created pouch directly to the small intestine.

After gastric bypass, swallowed food will go into this small pouch of the stomach and then directly into the small intestine, thereby bypassing most of your stomach and the first section of your small intestine.

What is a gastric bypass?

What is a gastric sleeve?

It is a bariatric surgery procedure where a large portion of the stomach is removed, leaving behind a narrow “Sleeve.”

Reducing your stomach helps restrict calories and reduce hunger signals.

What is a gastric sleeve?

Gastric Bypass vs. Gastric Sleeve Procedure: The similarities

Below are the similarities of both procedures :
Terms of similarity  
Not reversible
Stay in Hospital
2-3 days

Gastric Bypass vs. Gastric Sleeve Procedure: The differences

Below are the main differences :

Terms of Differences
The procedure
Gastric Bypass
Creation of a small pouch connected to the small intestine
Gastric Sleeve
Removal of a portion of the stomach
Weight loss
Gastric Bypass
Gastric Sleeve
Time required for weight loss
Gastric Bypass
Gastric Sleeve
Gastric Bypass
Gastric Sleeve
Gastric Bypass
Gastric Sleeve

Gastric Bypass vs. Gastric Sleeve: The ideal candidates

For the majority of surgeries, you need to meet the following requirements:

  • Have a BMI of 40 or greater.
  • Have a BMI of 35 or greater with comorbidity.
  • Be healthy enough to undergo surgery.
  • I have made earnest efforts to lose weight through diet and exercise.
  • Been overweight for more than just a couple of years.

The differences in terms of advantages and disadvantages


  1. One of the biggest advantages of gastric sleeve and gastric bypass surgery is that they significantly reduce your risk of obesity-related conditions, such as:
  • Type 2 diabetes
  • Hypertension, or high blood pressure
  • Hyperlipidemia, or high levels of cholesterol and triglycerides
  • Heart disease
  • Stroke
  • Fatty liver disease
  • Sleep apnea
  • Knee or hip pain
  1. Improve Physical function, mood, and quality of life.


  1. Not reversible.
  2. Weight loss may be difficult or lessened in certain conditions
  3. The body still tolerates carb-rich and high-fat foods, which can slow weight loss
  4. No dumping syndrome (discomfort from eating foods rich in carbs)
  5. Potential for leaks and other complications exists

The differences in terms of results

Gastric bypass results in more weight loss in a shorter time, as of 12 to 18 months after the surgery you might lose up to 80% of your weight in gastric bypass while you lose up to 70% in gastric sleeve.

How can ILAJAK help in choosing the most appropriate weight loss procedure?

ILAJAK Medical FREE consultation with experienced medical consultants, they will explain all the available procedures with their advantages and disadvantages, and with the help of our surgeons, we recommend the best procedure for you as per your condition and your expectations.

Gastric Bypass versus Gastric Sleeve faqs

In the long-term, sleeve gastrectomy carries less risk of death and complications than gastric bypass, but patients were more likely to need follow-up surgery.
Losing weight is faster with gastric bypass, up to 70% of weight loss occurs in the first 6 to 8 months.
Generally, Gastric bypass carries more risk but results in more and faster weight loss.

ILAJAK Medical | A Passion for Care

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