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How much weight will I lose after gastric banding or bypass surgery?

ANSWER

After gastric bypass surgery, most people can expect to lose between 66% and 80% of their extra body weight. Most of this is lost within the first two years.

After gastric banding, people lose 40% to 50% of their extra weight, typically within the first two years after the surgery.

SOURCES: News release, Allergan. Sjöström, L. , December 2004. WebMD Medical Reference: "What to Expect After Weight Loss Surgery;" "Your Options in Weight Loss Surgery: Making the Choice;" "Preparing for Weight Loss Surgery;" "Life After Weight Loss Surgery;" and "Is Weight Loss Surgery for You?"


New England Journal of Medicine

American Society for Metabolic and Bariatric Surgery: "Bariatric Surgery Procedures."

Cleveland Clinic. 

National Institute of Diabetes and Digestive and Kidney Diseases.

Reviewed by Carol DerSarkissian on February 7, 2019

SOURCES: News release, Allergan. Sjöström, L. , December 2004. WebMD Medical Reference: "What to Expect After Weight Loss Surgery;" "Your Options in Weight Loss Surgery: Making the Choice;" "Preparing for Weight Loss Surgery;" "Life After Weight Loss Surgery;" and "Is Weight Loss Surgery for You?"


New England Journal of Medicine

American Society for Metabolic and Bariatric Surgery: "Bariatric Surgery Procedures."

Cleveland Clinic. 

National Institute of Diabetes and Digestive and Kidney Diseases.

Reviewed by Carol DerSarkissian on February 7, 2019

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How does weight loss surgery affect overall health?

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