New research indicates that patients who stop using blockbuster slimming jabs like Mounjaro or Wegovy can put back on shed pounds at a significantly accelerated pace than those who end traditional diet and exercise regimens.
Published data in a major health publication shows that while overweight individuals can lose about a fifth of their body weight while using the jabs, the weight returns at an estimated rate of 0.8 kg per month once they quit.
"Individuals purchasing these treatments need to be aware of the potential of quick rebound weight gain when the medication is stopped," cautioned lead investigator Dr. Susan Jebb.
That rate of regain suggests a return to original mass within about one and a half years.
Analyzing Approaches
The research, which reviewed dozens of trials involving thousands of patients, compared the outcomes of GLP-1 agonists with conventional dieting.
The team emphasize that individuals who lose weight through lifestyle changes alone usually have a slower creep back—around 0.1 kg a month—once they finish.
Explaining the Quick Rebound
Experts suggest the mode of action of the drugs is key to understanding the accelerated regain.
These medications imitate a body's own chemical called glucagon-like peptide-1, which controls appetite.
"Artificially providing the hormone concentrations several times higher than normal could lead to the system to produce less of its endogenous GLP-1, and could reduce sensitivity to its effects," explained Dr. Adam Collins, a dietetics specialist.
"Stopping of this medication leads to hunger is uncontrolled, making excessive eating much more probable."
A Lifelong Issue?
Health authorities recommend the injections for people with weight-linked medical conditions, accompanied by prescribed diet and exercise modifications.
A number of clinicians say that, considering the significant potential of relapse, the therapy is often life-long.
This view is supported by drug manufacturers, who state that the results "underscore the chronic nature of obesity," comparing it to managing diseases like diabetes.
Patient Accounts
Users who have stopped the medication report a sudden resurgence of hunger.
"It was like a switch activating and you're instantly extremely hungry," described an individual.
This challenge is exacerbated if individuals have not established permanent lifestyle or habit changes during treatment.
Widespread Interest
Recent estimates show that a significant number of adults in the UK have tried weight-loss jabs in the last 12 months, with desire remaining high.
- Use is higher among females than men.
- The 40s and 50s age group shows the greatest usage rates.
- A large proportion obtain the medications through private prescriptions rather than the NHS.
Ultimately, clinicians emphasize that while the jabs are powerful agents for weight loss, they are not a permanent fix and long-term success relies on ongoing lifestyle management.
