Why did the weight come back after I stopped a GLP-1?

Because that is what these medications do when they stop. In the largest trial to follow people after withdrawal, participants regained about two-thirds of the weight they had lost within a year. Appetite returns, and the body actively defends its previous weight. This is a well-documented physiological pattern, not a failure of willpower.

What the research actually found

The STEP 1 trial extension followed 327 people after they stopped taking semaglutide. The pattern was clear and consistent:

Average weight loss on the medication was 17.3% of body weight over 68 weeks
One year after stopping, participants had regained 11.6 percentage points of that loss
The net result was a 5.6% loss from where they started
Improvements in cardiometabolic markers also drifted back toward baseline

So the weight did not all come back, and the loss was not erased. But roughly two-thirds returned, and it returned for almost everyone. If this happened to you, you are the rule rather than the exception.

Why it happens

Two things unwind at the same time.

Appetite comes back. These medications work substantially by reducing hunger and slowing how quickly the stomach empties. Remove them and that effect fades. Portions that felt like plenty start to feel like a starting point, and the internal signal that used to say “enough” goes quiet.

The body defends its previous weight. After meaningful weight loss the body adjusts hormonally and metabolically in ways that push toward regain. That happens after any substantial weight loss, medication or not. It is a biological response, and it is not something you can out-discipline.

The honest part

The researchers’ own conclusion was that obesity is chronic and that ongoing treatment is generally required to maintain the improvements. That deserves stating plainly, because a lot of what is written about this topic implies that the right habits can substitute for the medication.

Coaching does not replace a GLP-1 and no coach should suggest it does. Whether to stay on, adjust, or come off a medication is a decision between you and the physician who prescribed it.

What this means in practice

What the trial measured was medication withdrawal. What it could not measure is what happens when the months on treatment are used deliberately, to build eating patterns, strength, and sleep that do not depend on appetite suppression to hold.

That is the work coaching can do, whether you are on a GLP-1 now, coming off one, or already past it and looking at the regain. It is a smaller claim than “keep it all off”, and it is an honest one.

Begin with clarity, not another quick fix.

A free 30-minute conversation about where your health actually is, and what a sustainable path forward looks like. No sales pressure, no meal plan handed to you at the end.