How Gut Bacteria Change After Weight-Loss Surgery and Affect Health

Researchers want to understand how weight-loss surgery changes the bacteria in your gut and how those changes might improve your heart and metabolic health. You would provide blood and stool samples before surgery and at several visits over the following three years, and during surgery, doctors would collect small tissue samples. This information will help doctors predict who benefits most from surgery and potentially develop new ways to help people with obesity and related health conditions.

Weight-loss surgery is increasingly used to treat obesity and related diseases like diabetes and heart disease, but we don't fully understand how the surgery affects the beneficial bacteria in your gut or why some people have better health improvements than others. This study aims to fill that gap, especially for African American patients who face higher rates of these health conditions.