Compare Gastric Sleeve vs Gastric Bypass surgery and learn about expected weight loss, side effects, and cost to decide which surgical procedure is best for you. Deciding between gastric sleeve vs gastric bypass is an important decision and comparing the difference can help you make the final decision.  

Gastric Sleeve vs Gastric Bypass: Compare Pros and Cons

  • Lower Surgical Risk: Gastric Sleeve Surgery
  • Least Invasive: Gastric Sleeve Surgery
  • Fastest Rate of Weight Loss: Gastric Bypass Surgery
  • Lower Complications: Gastric Sleeve Surgery
  • Lower Side Effects: Gastric Sleeve Surgery
  • Lower Cost: Gastric Sleeve Surgery
  • Reversible: Gastric Sleeve Surgery is not reversible, but Gastric Bypass Surgery could be
  • More Effective at Resolving Comorbidities: Gastric Bypass Surgery

Interested in gastric sleeve surgery in Tijuana, Mexico? Find out if you qualify for gastric sleeve by clicking through to our online application form or contact us today to find out more. 

Start Online Application

Contact Us Today

Compare Gastric Sleeve vs Gastric Bypass

Bariatric surgery statistics show that gastric sleeve and gastric bypass are being chosen more often for treating long-term weight loss than all other surgical procedures.

In fact, gastric bypass accounts for approximately 80% of all the bariatric surgeries in the United States.

Comparing gastric sleeve vs gastric bypass can be a time consuming process. And, no matter the surgery option you choose – both gastric sleeve and gastric bypass requires serious commitment to behavior and diet modifications.

Gastric sleeve and gastric bypass surgeries are two forms of bariatric surgery, which are procedures that can alter both the size and shape of the stomach. Although both methods are popular and result in weight loss surgeries, there are many differences between them.

If you’re considering gastric sleeve or gastric bypass surgery, here’s what you need to know about them to make an informed decision. The following chart compares the differences between gastric sleeve vs gastric bypass.

 Gastric SleeveRNY Gastric Bypass
Surgical RiskLow to moderateModerate
Rate of
Weight Loss
Slower than gastric bypassRapid
Average
Weight Loss
50-80% of excess body weight within 12 months60-85% of excess body weight within 12-18 months
Operating Time1-2 hours1-2 hours
Recovery Time3-4 weeks9-12 weeks
Hospital Stay2 nights3 nights
Time off Work2 weeks2-3 weeks
ReversibleNoCould be, but high risk
Medical ImplantNoNo
How it
Promotes
Weight Loss
  • Restrictive
  • Limits food intake
  • Reduces hunger sensations by removing Ghrelin (hormone that plays a key role in regulating body weight)
  • Restrictive & Malabsorption
  • Limits food intake
  • Reduces absorption of calories and nutrients
Change
to Intestine
  • No change to the intestine during gastric sleeve surgery
  • Small intestine is cut and bypassed during RNY gastric bypass surgery
Change
to Stomach
  • Stomach Size is Reduced
  • 60-80% of the stomach is removed, leaving a vertical narrow pouch 2-3 oz (60-100 cc)
  • New Stomach Created
  • Stomach is divided into a small upper pouch 1 oz (20-30 cc) and a larger lower pouch
Bariatric Diet & Dietary Guidelines
  • 600-800 calories per day during weight loss (24 months)
  • Eat protein rich foods
  • Avoid high calorie and fat food
  • Avoid carbonated drinks
  • Drink 6-8 cups of water a day
  • Eat 1000-1200 calories per day after 24 months

  • 800 calories per day during weight loss (12-18 months)
  • 3 small protein meals per day
  • Avoid sugar and fats to prevent dumping
  • Avoid carbonated drinks
  • Drink 6-8 cups of water a day
  • Eat 1000-1200 calories per day after 18 months

New Eating Habits After Bariatric Surgery
  • Eat small portions daily
  • Eat 4-6 times a day
  • Chew food throughly to puree consistency before swallowing
  • Eat slowly
  • Eat high-protein foods
  • No drinking with meals, drink water 30 minutes before or after meals

  • Eat small portions daily
  • Chew food throughly to puree consistency before swallowing
  • Eat slowly
  • Eat high-protein foods
  • No drinking with meals, drink water 30 minutes before or after meals

Bariatric Vitamins, Minerals & Nutritional Supplements
  • Multivitamin
  • Calcium
  • Vitamin B12
  • Multivitamin
  • Calcium
  • Iron
  • Vitamin B12
Pros, Benefits, Advantages of
Weight Loss Surgery
  • Pyloric valve and small intestine are kept intact
  • Reduces hunger (the portion of stomach that produces Ghrelin, the hunger stimulating hormone, is removed)
  • Option for patients who do not qualify for band or bypass
  • Fewer food intolerances
  • Low malnutrition risk
  • May be converted to gastric bypass or duodenal switch
  • Revision option for gastric band patients

  • Rapid weight loss during the first 6 months
  • Reduces food intake
  • Reduces calorie intake
  • Proven long-term effectiveness maintaining weight loss
  • Most common and widely accepted weight loss surgery

Cons, Risks, Disadvantages of
Weight Loss Surgery
  • Bleeding
  • Blood clots
  • Leakage
  • Infection
  • Pneumonia

  • Blood clots
  • Bowel obstruction
  • Dumping syndrome
  • Infection
  • Leaks
  • Nutrient deficiencies
  • Reflux (GERD)
  • Ulcers
Am I a Candidate for Weight Loss Surgery?
  • Gastric sleeve is best for obese patients
  • High-risk patients with a BMI > 60 as a “first-stage” procedure
  • Gastric bypass is most effective for patients with a BMI of 35-55

Mechanism of Action: Gastric Sleeve vs Gastric Bypass

Gastric Sleeve Surgery: After a gastric sleeve, about 10 percent of the stomach remains and is arranged into a small upright sleeve. This procedure promotes weight loss in two ways. The first is by restricting the amount of food you can consume, and the second is by reducing feelings of hunger by removing a large part of the stomach that produces the hunger-inducing hormone ghrelin.

Gastric Bypass Surgery: Gastric bypass, on the other hand, is both restrictive and malabsorptive dividing the stomach and the small intestine into two sections. Next, the smaller portion of the stomach is reconnected to the small intestine. Like a gastric sleeve, gastric bypass promotes weight loss by limiting food intake, but it also serves to reduce the calories and nutrients your body can absorb, thereby resulting in further weight loss. 

Reporting Results/Outcomes: Gastric Sleeve vs Gastric Bypass

Reporting of weight loss results and outcomes after bariatric surgery are often determined by 1) the percentage of excess weight loss, 2) the percentage of improvement or resolution of obesity-related comorbidities, 3) the risks of complications and 4) the risk of death.

Expected Weight Loss: Gastric Sleeve vs Gastric Bypass

Gastric Sleeve Surgery: Patients can expect to lose as much as 50 to 80 percent of their excess body weight within 12 to 24 months of surgery. Clinical studies show that patients experienced 55.4 percent excess weight loss with follow-up periods every 3 to 60 months. Patients can expect to lose 25 to 30 pounds within the first 30 days after surgery and achieve their ideal weight goal within 9 months after surgery.

Gastric Bypass Surgery: Patients can expect to lose up to 60 to 85 percent of their excess body weight within 12 to 18 months of surgery. Clinical studies show that patients were successful in sustaining weight loss over a long period of time – keeping more than 61 percent of the excess body weight off for up to 20 years. 

Improvement/Resolution of Co-Morbid Conditions

Both gastric sleeve and gastric bypass are effective in improving or complete resolution of comorbid conditions such as type 2 diabetes, high blood pressure (hypertension), high cholesterol, obstructive sleep apnea, and acid reflux (GERD). 

However, gastric bypass is more effective at resolving and improving obesity-related comorbidities, plus it has the advantage of being able to eliminate gastro-esophageal reflux disease (GERD) in most cases.

If your life is affected by any of these conditions, gastric sleeve or gastric bypass may help you.

Gastric Sleeve Surgery: Bariatric and metabolic studies report that gastric sleeve “resolved” type 2 diabetes (56%), high blood pressure (49%), high cholesterol (67%), and sleep apnea (60%). Additionally, clinical studies show that gastric sleeve surgery “improved” type 2 diabetes (37%), high blood pressure (29%), high cholesterol (38%), and sleep apnea (33%).

Gastric Bypass Surgery: Bariatric and metabolic studies show that gastric bypass “resolved” type 2 diabetes (76.8%), high blood pressure (61.7%), high cholesterol (70-95%), sleep apnea (85.7%) and acid reflux (98%). Furthermore, clinical studies show that gastric bypass surgery “improved” type 2 diabetes (85.4%), high blood pressure (78.5%), high cholesterol (70-95%), and sleep apnea (83.6%).

Complications: Gastric Sleeve and Gastric Bypass

Both gastric sleeve and gastric bypass have some complications in common such as bleeding and leakage from the staple line. Gastro-esophageal reflux disease (GERD) is common after gastric sleeve surgery, whereas gastric bypass will improve it. Some complications are possible with gastric sleeve, but are more common among gastric bypass patients, including:

  • Dumping syndrome
  • Intestinal obstruction
  • Malnutrition or deficiencies
  • Anastomotic stricture
  • Gallstones

Gastric sleeve patients require less time for recovery and can get back to most normal functions within three to four weeks. By contrast, gastric bypass patients need nine to 12 weeks for recovery time. However, following either surgery, patients can get back to work within two to three weeks. 

Cost of the Procedures

Because gastric bypass is a more complicated procedure, it’s more expensive than a gastric sleeve. On average, a patient can expect to pay about $25,000 for a gastric bypass in the United States or Canada, whereas gastric sleeve will cost about $20,000. 

There are advantages and disadvantages to both gastric sleeve and gastric bypass, and it’s important to know how these two procedures are different if you’re trying to decide between one or the other.

The main things to remember are that gastric sleeve is less invasive and less complicated, but gastric bypass results in faster and higher weight loss. In general, both procedures are successful at promoting weight loss, and both can be a valuable step to becoming a healthier you.

Considering Gastric Sleeve vs Gastric Bypass

No matter what weigh-loss surgery option you choose – gastric sleeve or gastric bypass… making a serious commitment to behavior and diet modifications is critical to sustained weight loss.

Interested in getting approved for gastric bypass or gastric sleeve surgery in Mexico? Find out if you qualify by clicking through to our online application form or contact us today to find out more. 

Start Online Application

Contact Us Today

Gastric Sleeve Surgery

Gastric Sleeve Surgery is a weight loss surgery that reduces stomach capacity and food intake. The restriction process helps promote weight loss in two ways: 1) the smaller stomach restricts the amount of food that can be eaten and 2) the hunger hormone (ghrelin) is removed so appetite and feelings of hunger are lowered.