Not necessarily, but most people regain a large share of the weight when they stop a GLP-1 like Wegovy or Zepbound: about two-thirds within a year in the main semaglutide trial. Whether you can come off depends mostly on where you started, and staying on doesn’t have to mean staying on the full dose. No one can tell you ahead of time whether you’ll be one of the people who can stop, but the habits you build help either way.
What happens when you stop
When treatment stops, biology pushes back. Hunger rises, cravings return, and the body burns fewer calories than before. That’s why regain is so common, and why it isn’t a personal failure: obesity is a chronic condition, and these medicines treat it while you take them.
In the follow-up to STEP 1, the main Wegovy trial, people who stopped semaglutide after 68 weeks had regained about two-thirds of the weight they lost one year later. Most of the improvements in blood pressure, blood sugar and cholesterol also faded back toward where they started.
If your BMI is 30 or higher
This is the group the stopping studies mostly describe, and it’s why many doctors advise staying on long term. Two things soften that:
- Habits change the curve. In a trial of a GLP-1 medicine combined with exercise, people who exercised while on the medicine regained less after stopping than people who only took the medicine.
- Maintenance can be a lower dose. The Zepbound and Wegovy labels list lower doses as maintenance doses, and some people stay on one of the lowest ones for the long term. How much you need is individual.
If your BMI is under 30
The studies say little about this group, so this comes from clinical experience rather than trials. The people who come off and keep the weight off tend to be highly motivated and are still doing the work: nutrition, exercise, mindful eating, and a plan for managing food noise.
If you want to stop
Don’t stop abruptly on your own. Stopping takes a plan, not hope: protect your muscle with protein and strength training (see protein and muscle on a GLP-1), work on sleep and stress, and decide with your doctor whether to taper and how you’ll watch your weight afterwards.
Sources
- Wilding et al., Diabetes, Obesity and Metabolism, 2022: weight regain and cardiometabolic effects after stopping semaglutide (STEP 1 extension)
- Jensen et al., eClinicalMedicine, 2024: weight maintenance one year after stopping exercise, a GLP-1 receptor agonist (liraglutide), or both
- Zepbound prescribing information and Wegovy prescribing information: maintenance doses
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