Obvioisly you dont stop eating. You'd die.
But plenty of literature out there saying jabs send signals to the brain so you think youre full. Cuts out food noise as they put it and also slows down digestion. Others, on here, on the jabs, have said its stopped them wanting to eat shite.
Agreed about portions. But I do that without the need for any jabs tbf. With your theory then those on the jabs should be able to come off them, realising the error of their ways (portion size) and keep the weight off.
What also doesn't help is people have forgotten what the human body is supposed to look like. Endless comments on here saying if they got down to what is deemed a healthy weight they'd look ill/like they have AIDS. I mean there are a lot of people with a look now you can immediately tell they are jabbers.