I haven’t had the mini gastric bypass (MGB) myself yet, but I’ve read a lot of experiences from others. It’s common for some people not to lose anything in the first two weeks after surgery, and then suddenly drop around 10 pounds in a week. Then, they often plateau again. For some, starting a medication like a GLP-1 receptor agonist helps make the weight loss more consistent. But it usually takes a few months to reach that point.