Fresh analysis reveals that patients who come off popular weight-loss injections like Wegovy and Mounjaro may regain lost weight far faster than those who stop conventional lifestyle programs.
Research printed in a leading health publication shows that while overweight people can lose a large proportion of their total mass while on the medication, the mass comes back at an average rate of nearly a kilo each month after stopping.
"People purchasing these treatments must be aware of the potential of fast rebound weight gain when the treatment is stopped," warns lead investigator Dr. Susan Jebb.
This pace of regain suggests a reversion to pre-treatment mass within about 18 months.
Comparing Treatments
The study, which looked at dozens of studies involving over 9,000 of participants, contrasted the effects of these new drugs with other pills.
Scientists note that individuals who lose weight through dieting generally experience a more gradual creep back—around 100 grams monthly—after stopping.
Explaining the Fast Rebound
Experts propose the mode of action of the drugs explains the amplified rebound.
The injections copy a natural hormone called GLP-1, which moderates hunger.
"Long-term administration of GLP-1 levels several times higher than normal could lead to the system to generate a reduced amount of its endogenous GLP-1, and may also lessen responsiveness to its effects," explained Dr. Adam Collins, a dietetics researcher.
"Stopping of this medication results in hunger is unsuppressed, making excessive eating a significant risk."
An Ongoing Condition?
The NHS advise the injections for individuals with obesity-related medical conditions, alongside prescribed diet and exercise modifications.
A number of clinicians argue that, given the significant potential of weight regain, the therapy is often long-term.
This opinion is echoed by drug manufacturers, who note that the findings "emphasize the persistent character of obesity," comparing it to managing conditions like diabetes.
Patient Testimonies
Individuals who have discontinued the jabs report a powerful return of cravings.
"It was like a switch that goes on and you're instantly starving," said one woman.
This challenge is compounded if individuals have not adopted permanent lifestyle or habit changes during therapy.
Widespread Adoption
Survey data show that a significant number of people in the UK have tried these injections in the past year, with demand remaining high.
- Use is greater among women compared to men.
- The middle-aged demographic shows the highest usage rates.
- Many obtain the drugs through private prescriptions rather than the NHS.
Ultimately, clinicians emphasize that while the jabs are powerful agents for weight loss, they are not a magic fix and long-term success likely depends on integrated behavioural management.
