KeptWhat happens when you stop a GLP-1
- Most people regain weight after stopping a GLP-1. In the trials, about two-thirds of the lost weight came back within a year on average.
- Regain is usually slow at first. A 2026 BMJ review of 37 studies found about 0.4 kg (just under 1 lb) a month on average.
- Appetite and food noise often return in the first weeks, before the scale moves much. That's the window where habits matter most.
- Averages hide a wide range. Some people keep most of their loss, and the habits they share are well studied.
GLP-1 medicines like semaglutide (Ozempic, Wegovy) and tirzepatide (Mounjaro, Zepbound) work partly by turning appetite down. When you stop, that effect wears off over a few weeks. What happens next varies a lot from person to person, but the research gives a clear picture of the average path, and of what the people who keep their weight off tend to do.
Your appetite comes back first
Most people notice hunger and "food noise" (the constant background thoughts about food) returning before they see any change on the scale. Portions that felt like plenty start to feel small. Snacks you had stopped thinking about show up in your head again.
This is expected. It isn't a failure of willpower: the medicine was doing some of the appetite work, and now your own habits are doing all of it. Knowing that it's coming, and having a plan for those moments ready before they arrive, is one of the most useful things you can do. Our guide to food noise covers what helps.
Then weight starts to creep back
The big trials stopped the medicine and followed people for about a year:
- Semaglutide (STEP 1 extension): one year after stopping, people had regained about two-thirds of the weight they had lost, on average.
- Tirzepatide (SURMOUNT-4): people switched to placebo regained 14% of their body weight over 52 weeks, while those who stayed on it lost a further 5.5%.
- All weight-loss medicines (BMJ, 2026): across 37 studies, regain averaged about 0.4 kg (0.9 lb) a month, with a projected return to starting weight in about 1.7 years if nothing else changes.
Read the numbers in detail in weight regain after GLP-1s: what the studies show, or put in your own weights with the weight regain calculator.
The important word is creep. Under a pound a month is easy to miss on any single morning, because daily weight swings by 2 to 4 lb with water, salt and sleep. By the time clothes feel tight, the gap is often 8 or 10 lb, and that's much harder to close than 2.
Not everyone regains
Trial averages describe groups. In SURMOUNT-4, close to half of the people switched to placebo still kept at least a 10% loss from where they started. Research on people who maintain a large weight loss for years, such as the National Weight Control Registry, finds a short list of shared habits:
- They weigh themselves regularly (75% at least weekly) and react early to small gains.
- They keep their eating pattern consistent, including on weekends.
- Most eat breakfast and are active most days.
None of these are dramatic. They're small, boring and repeatable, which is why they last. Our guide on how to keep weight off after a GLP-1 turns them into a daily routine.
Cold turkey, tapering, or staying on
Whether to stop at once, step down gradually or stay on a lower dose is a medical decision for you and your prescriber, and we don't give advice on doses. For context: both STEP 1 and SURMOUNT-4 stopped the medicine at once, so tapering hasn't been studied in the same way yet. If you've been prescribed a GLP-1, talk to your prescriber before you change anything.
A simple plan for the first 12 weeks
- Pick your line now. Note your current weekly average and decide the gain that will make you act, for example 3 lb.
- Weigh daily, judge weekly. Daily weigh-ins are fine as long as you look at the 7-day average, not a single morning.
- Write your loud-moment plan while you're calm. Three steps and two go-to snacks for when food noise gets loud.
- Keep protein and strength in your week. They help you stay full and protect muscle while your appetite readjusts.
- Act at the line, not past it. When your average crosses it, tighten one habit for two weeks. Small fixes work when the gap is small.
Common questions
Will I gain all the weight back after stopping a GLP-1?
Not necessarily. On average, people in the trials regained about two-thirds of their lost weight within a year, but results varied widely and many kept a meaningful loss. Regular weighing, a consistent eating pattern and acting early on small gains are the habits most linked to keeping weight off.
How long does it take for appetite to come back after stopping?
It varies with the medicine and the person, but many people notice hunger and food noise returning within a few weeks, as the drug leaves the body. Appetite usually returns before weight does.
Should I taper off or stop at once?
That's a decision for you and your prescriber. The main withdrawal trials stopped the medicine at once, and gradual tapering hasn't been studied in the same way. Kept doesn't give advice on doses.
Does Kept help with stopping a GLP-1?
Kept is a habits app for the time after, or while cutting down. It doesn't advise on medication. It gives you a 20-second morning check-in, a weight band that flags drift early and a plan for when food noise comes back.
Sources
- Wilding JPH et al. Weight regain and cardiometabolic effects after withdrawal of semaglutide: the STEP 1 trial extension. Diabetes, Obesity and Metabolism, 2022. Link
- Aronne LJ et al. Continued treatment with tirzepatide for maintenance of weight reduction in adults with obesity (SURMOUNT-4). JAMA, 2024. Link
- West S et al. Weight regain after cessation of medication for weight management: systematic review and meta-analysis. BMJ, 2026;392:e085304. Link
- Wing RR, Phelan S. Long-term weight loss maintenance. American Journal of Clinical Nutrition, 2005;82(1 Suppl):222S-225S. Link