A recent study indicates that people who come off new GLP-1 drugs like Wegovy and Mounjaro may regain reduced body mass at a significantly accelerated pace than those who halt traditional diet and exercise programs.
Published data in a major medical journal points out that while obese individuals frequently drop about a fifth of their total mass while undergoing treatment, the mass returns at an estimated rate of 0.8 kg per month upon discontinuation.
"People using these medications should be aware of the danger of fast rebound weight gain when the therapy concludes," cautioned researcher Dr. Susan Jebb.
That rate of regain suggests a return to original weight in about one and a half years.
Analyzing Treatments
The study, which reviewed dozens of trials involving thousands of patients, compared the results of GLP-1 agonists with older methods.
Scientists emphasize that people who lose weight through diet and exercise typically experience a less rapid creep back—around 100 grams monthly—once they finish.
Explaining the Rapid Regain
Doctors suggest the mechanism of the injections accounts for the amplified rebound.
These medications copy a natural hormone called glucagon-like peptide-1, which controls feelings of fullness.
"Sustained high doses of GLP-1 concentrations several times higher than normal might result in the system to generate a reduced amount of its endogenous GLP-1, and may also diminish responsiveness to its actions," noted Dr. Adam Collins, a nutrition researcher.
"Stopping of this GLP-1 'fix' leads to hunger is uncontrolled, making excessive eating far more likely."
A Lifelong Issue?
Medical guidelines recommend the injections for individuals with obesity-related health risks, accompanied by recommended diet and exercise modifications.
Many experts argue that, due to the high risk of relapse, the therapy might need to be long-term.
This view is reinforced by drug manufacturers, who state that the results "underscore the long-term nature of excess weight," akin to managing diseases like high blood pressure.
User Accounts
Users who have discontinued the medication explain a sudden return of appetite.
"It felt as if a trigger activating and you're instantly starving," said an individual.
The struggle is exacerbated if users have not developed sustainable dietary or behavioural changes during therapy.
Significant Interest
Recent estimates show that millions of adults in the UK have used weight-loss jabs in the past year, with interest remaining high.
- Adoption is more common among females compared to males.
- The middle-aged age group shows the greatest usage rates.
- A large proportion access the medications through private healthcare rather than public health services.
In conclusion, clinicians caution that while these medications are powerful agents for weight loss, they are not a magic fix and maintained weight loss relies on combined behavioural support.
