What it means
The most common procedures in the US are sleeve gastrectomy and gastric bypass. Both make the stomach smaller, and bypass also reroutes part of the small intestine. These changes affect hunger and fullness signals, not just how much food fits.
The NIDDK says adults with a BMI of 40 or higher may qualify, as may adults with a BMI of 35 or higher who also have a serious weight-related health problem. Some surgical groups now support lower thresholds, and insurers set their own criteria.
Surgery generally leads to more weight loss than lifestyle changes alone, and many people see improvements in type 2 diabetes and blood pressure. It also carries surgical risks and requires lifelong vitamin and mineral follow-up.
Some people use GLP-1 medicines before or after surgery, under the guidance of their surgical and medical team. The right path depends on health history and personal goals.
Why it matters
Surgery and GLP-1 medicines are the two most effective obesity treatments, so they often come up in the same conversation.