A new study suggests that a popular GLP-1 weight loss drug may slow biological aging. The drug, also used for diabetes, may have additional benefits, including potentially reducing cancer risk and having a positive effect on the brain, although some reports indicate it may also have unintended consequences, such as being misused by patients with eating disorders or leading to decreased physical activity. The effects and potential uses of GLP-1 weight loss drugs are still being researched, with some studies yielding conflicting or uncertain results.