It is not ineffective outside of clinical trials. All the evidence says that people gain some weight back after they discontinue treatment - which is not a lack

It is not ineffective outside of clinical trials. All the evidence says that people gain some weight back after they discontinue treatment - which is not a lack of efficacy. But they also usually gain back less then they lost. https://pmc.ncbi.nlm.nih.gov/articles/PMC12361690/ https://pmc.ncbi.nlm.nih.gov/articles/PMC12361690/