Research on GLP-1 weight loss drugs has revealed surprising mental health effects, including a potential link to a drop in violent behavior and lower risks of addiction and overdose. The drugs, which include semaglutide, may also have other benefits and risks, although the extent of these effects is not entirely clear. Some studies suggest that the medications may carry unexpected stigma or side effects, such as "ghost fat," but the overall impact on mental health remains a subject of ongoing research.