Gastric Sleeve Weight Loss Timeline and Chart

What’s the goal of gastric sleeve surgery? For most people it’s a tool used to lose weight and end the cycle of obesity. More importantly, it’s one of the most effective stepping stools to get on the right track, create healthy habits, and implement diet and exercise long-term.

Beyond weight loss, gastric sleeve surgery offers a long list of benefits ranging from reducing obesity-related comorbidities to increase confidence.

Diet and exercise can work – but combining them with gastric sleeve surgery can provide substantial results of weight loss long-term.

Gastric Sleeve Surgery Weight Loss Timeline - Month 3, 6, 12Gastric sleeve weight loss can be expected to reach an average of 65-70% excess weight loss in the first 12 months. This means that rougly 65-70% of weight that is considered “overweight” (or excess weight) is lost within a year after surgery.

We have seen patients lose 80% or more of their excess weight within the first year after surgery and we also have seen patients only lose 50% of their excess weight.

Our data show a strong correlation between the amount of excess weight loss with following the post-op diet, exercise routine, and healthy lifestyle habits.

The truth is, weight loss surgery is a tool and needs to be accompanied by a healthy lifestyle to maintain long-term results.

Our patients also have seen significant improvements or remission in comorbidities such as high blood pressure, high cholesterol, obstructive sleep apnea and type II diabetes.

For additional questions please don’t hesitate to contact us using the below contact form, and we will get back to you as soon as possible.

See If You Qualify for Weight Loss Surgery - Mexico Bariatric Center

What Weight Loss Can I Expect After Gastric Sleeve?

Here is the average weight loss our past patients have recorded from the sleeve journey. The question is, how do you calculate your own weight loss. Well, we will show you!

Gastric Sleeve Expected Weight Loss Timeline - Full Procedure Summary and Benefits Infographic

The amount of excess weight you can expect to lose is dependent on several different factors, although dedication to the post-surgery diet plays a major role.

Gastric Sleeve Weight Loss Calculator

In order to determine the amount of weight you will lose after gastric sleeve surgery, we created a weight loss timeline specific to your weight.

Here is the guideline to calculate your expected weight loss from gastric sleeve surgery. Simply follow steps 1 through 3 to get an estimate of how much you will lose weight:

  1. Find out your Ideal Weight from this table here.
  2. Excess Weight = Current Weight – Ideal Weight
  3. Expected Weight Loss = Excess Weight x 0.65 (65%-70% is an average)

Your new weight is going to be:

New Weight After Surgery = Current Weight – Expected Weight Loss

Remember that 65% is an average and a large number of Mexico Bariatric Center patients have lost up to 100% of their excess body weight.

Major Benefits of Gastric Sleeve Surgery

  1. Reduction of hunger. Ghrelin, the hunger-inducing hormone is reduced significantly by removing a portion of the stomach.
  2. No re-routing of the intestines, which promotes healthy digestion (essential for continued weight loss).
  3. No dumping syndrome, which allows the body to absorb the nutrients it needs for a healthy result.
  4. A more natural weight loss occurs as patients require less daily vitamins and receive nutrients through their diet
  5. Weight loss typically occurs over 18 months, which is more natural than that of gastric bypass surgery. Gastric sleeve surgery makes it easier to maintain the weight loss for a lifetime. Similar to that of lap band surgery, gastric sleeve surgery requires significant lifestyle changes for continued success.

Average Weight Loss After Gastric Sleeve

Studies have been performed to depict both short-term and long-term success rates after gastric sleeve surgery. These studies look at how much weight was lost and how long that weight was kept off. Most gastric sleeve patients lose up to 60% of their excess weight in a year and up to 70% of it in two years. Resolution of comorbidities occurs in just one to two years following weight loss surgery.

One Swiss study learned that patients kept off at least 57% of their excess weight five years following their surgery. Long-term success shows significant improvements in the risk of stroke or heart disease and a decrease in countless obesity-related medical conditions.

Gastric Sleeve Surgery - Expected weight loss

Studies for the Long-Term Weight Loss

The U.S. National Library of Medicine Study looked at different weight loss procedures to see how all of them compare regarding weight loss. The study found that when patients were followed up within 1, 2 and three years after surgery, those who had gastric sleeve surgery had more of a considered long-term weight loss than other surgery types.

Also, just 6.3% of the patients had any complications at all. 60% of the patients studied had experienced major weight loss in just one to two years (18 months) following their surgery.

Also: Will The Stomach Stretch After Gastric Sleeve Surgery?

Another study, the Surgery for Obesity and Related Diseases Study, looked at how successful gastric sleeve surgery was at helping patients keep weight off for an extended period. It looked at the results of patients who had the surgery five years ago. Things such as total weight loss, how quickly weight was lost, quality of life and complications were all evaluated.

The average amount of excess weight loss for those studied in this professional study was 61.5% after just one year and 61.1% after just two years. The average for all five years for 57.4 percent (pretty close to the expected weight loss surgeons usually tell patients at their consultation).

About Gastric Sleeve Surgery

Gastric sleeve surgery also called vertical sleeve gastrectomy (VSG), reduces the size of the stomach to by 80-85% (making it only 15-20% of its original size). The resected part of the stomach is removed. The sleeve is not a reversible procedure like lap band, however, it can be easily revised in contrary to gastric bypass surgery.

Gastric sleeve surgery is chosen because of it low-risk, high-results approach to weight loss surgery. Apart from Mexico Bariatric Center patients, we also used several study results to share other weight loss results with gastric sleeve surgery.

This gastric sleeve surgery in Tijuana, Mexico is performed laparoscopically, which minimizes the amount of recovery time and the risk of complications. Sleeve gastrectomy changes the body’s metabolic thermostat and brain’s set-point immediately after surgery, resulting in increased metabolism and decrease hunger.

Mexico Bariatric Center also offers Single-Incision Gastric Sleeve (SILS) in its center in Tijuana.


*Everyone loses weight at there own pace. Results vary and may not be typical.

Contact US

For additional questions please don’t hesitate to contact us using the below contact form, and we will get back to you as soon as possible.

* Prices are subject to change. Not valid on blackout dates. Prices depend on the surgeon, surgery, additional fees, and schedule. Prices may rise because of BMI level and previous abdominal surgeries.

** All of the testimonials are covered in our disclaimers. Individuals results will vary; there is no guarantee stated nor implied.

Last Updated: September 6, 2018 by Ron Elli, Ph.D.

Reviewed by Dr. Kimberly Langdon, M.D. August 2018