Bariatric Surgery · the truth

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Weight Management · Foundations
Surgery and weight-loss drugs are not a sign that willpower failed; they are legitimate options once the criteria are met. Under the 2022 ASMBS/IFSO standard, metabolic and bariatric surgery is recommended at a BMI of 35 or more and should be considered at 30–34.9 with metabolic disease; for Asian people the thresholds are lower, and surgery should be offered from a BMI of 27.5.

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Types of weight-loss surgery

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For true severe obesity, bariatric surgery produces the largest and longest-lasting weight loss of any current option, and in long-term controlled studies the people who had it also had lower mortality. But its costs are real; it is not a shortcut for the lazy.

It changes the structure of the digestive tract: the stomach is made smaller, and some operations also route food past a stretch of small intestine. Once that is done, the hunger and fullness signals sent by the gut change as well, so it has long been more than making the stomach smaller. The more accurate modern name is metabolic surgery.

For people who truly qualify, the risk of the operation is now lower than the risk of leaving severe obesity untreated, so international guidelines hold that for suitable patients, earlier usually brings more benefit than later. Since 2022, surgery has been recommended at a body mass index () of 35 or more, with or without complications; the threshold is lower for Asian patients, and China's guideline uses BMI ≥ 32.5, or ≥ 27.5 with type 2 diabetes.

If you have had the operation and then develop fever, a racing heart, or abdominal pain that keeps getting worse, or become confused or unsteady on your feet after severe vomiting, get medical care immediately.

Educational content, not medical advice — consult a clinician.

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Bariatric Surgery · the truth

Story

Connected to · 1

contrast · 1

Weight Management · Foundations
Surgery and weight-loss drugs are not a sign that willpower failed; they are legitimate options once the criteria are met. Under the 2022 ASMBS/IFSO standard, metabolic and bariatric surgery is recommended at a BMI of 35 or more and should be considered at 30–34.9 with metabolic disease; for Asian people the thresholds are lower, and surgery should be offered from a BMI of 27.5.

Read full story

Stop 1/5

Types of weight-loss surgery

EVIDENCEGUIDE 2 · REVIEW 1

READ THE ORIGINAL

For true severe obesity, bariatric surgery produces the largest and longest-lasting weight loss of any current option, and in long-term controlled studies the people who had it also had lower mortality. But its costs are real; it is not a shortcut for the lazy.

It changes the structure of the digestive tract: the stomach is made smaller, and some operations also route food past a stretch of small intestine. Once that is done, the hunger and fullness signals sent by the gut change as well, so it has long been more than making the stomach smaller. The more accurate modern name is metabolic surgery.

For people who truly qualify, the risk of the operation is now lower than the risk of leaving severe obesity untreated, so international guidelines hold that for suitable patients, earlier usually brings more benefit than later. Since 2022, surgery has been recommended at a body mass index () of 35 or more, with or without complications; the threshold is lower for Asian patients, and China's guideline uses BMI ≥ 32.5, or ≥ 27.5 with type 2 diabetes.

If you have had the operation and then develop fever, a racing heart, or abdominal pain that keeps getting worse, or become confused or unsteady on your feet after severe vomiting, get medical care immediately.

Educational content, not medical advice — consult a clinician.