The research says you gain the weight back:

"For the two in every five patients who discontinue the treatments within a year, according to a 2024 JAMA study, this means that they are likely to rebound to their original weight with less muscle and a higher body fat percentage." The other issue is the muscle loss on being on these drugs as "Clinical data shows that 25 per cent of weight loss from Eli Lilly’s shot resulted from a reduction in lean body mass, including muscle, while 40 per cent of Novo Nordisk’s jab was due to a drop in lean body mass." Via https://www.ft.com/content/094cbf1f-c5a8-4bb3-a43c-988bd8e2d...