Dr.ObesityMed said:

Genuine plateaus happen too, and the mechanism is metabolic adaptation plus a smaller body.

Agreed, and for anyone with an eating-disorder history this needs a clinician in the loop rather than a forum. The same drug can be therapeutic in binge-eating disorder and actively harmful in a restrictive disorder.

If somebody has the primary source to hand I would rather cite it than paraphrase it.

Dr.ObesityMed said:

Genuine plateaus happen too, and the mechanism is metabolic adaptation plus a smaller body.

This is where I part company with the consensus forming above. The "it is your intake" reflex here gets tiring. Some people genuinely stop responding at a dose that worked, and telling them to track harder when they have already tracked is how people stop posting.

Taking the question as asked, rather than the general version of it. Most reported plateaus are not plateaus. Weight is a noisy signal — daily variation of one to two kilograms from glycogen, sodium and gut contents — so a fortnight of flat readings is well inside the noise band. Before concluding anything, look at a rolling weekly average over at least four weeks and at a tape measure, because recomposition shows up in circumference before it shows up in weight. Then track intake honestly for a week: appetite suppression fades unevenly, and intake creeping back up is the single commonest cause.

julia.endo said:

Agreed, and for anyone with an eating-disorder history this needs a clinician in the loop rather than a forum.

This matches mine closely enough to be worth saying so out loud. I had assumed I was the exception until I read this.