The article discusses the history of failed weight loss treatments, including lap bands, fenphenphen, and Wegovy, which have seen obesity rates in the U.S. and elsewhere decline. Semaglutide, the active ingredient in Ozempic and Weguy, has proven to be more effective at helping people lose weight than traditional diet and exercise alone. However, there are still risks of severe side effects such as cataracts, deafness, and kidney failure, and many users will regain weight if they stop taking them. The article also discusses the controversial use of 2,4-Dinitrophenol, which has been used in dyes, munitions, and herbicides, and can also rapidly lose weight rapidly. Despite these issues, some scientists are still studying whether the mechanisms behind DNP can be safely exploited to treat obesity and related conditions.