Fresh analysis indicates that individuals who stop using blockbuster GLP-1 drugs like semaglutide or tirzepatide may regain shed pounds far faster than those who halt traditional diet and exercise regimens.
Research printed in a prominent medical journal points out that while overweight individuals often shed substantial amounts of their total mass while on the medication, the weight is regained at an average rate of 0.8 kg per month once they quit.
"People purchasing these drugs should be aware of the risk of fast rebound weight gain when the treatment ends," cautioned researcher Dr. Susan Jebb.
That rate of regain implies a reversion to pre-treatment mass in about 18 months.
Analyzing Approaches
The research, which reviewed dozens of trials involving thousands of participants, compared the effects of the injectable medications with other pills.
Scientists emphasize that individuals who lose weight through dieting typically see a slower creep back—perhaps 100 grams monthly—once they finish.
The Reason for the Quick Rebound
Doctors suggest the mechanism of the jabs accounts for the accelerated regain.
These medications mimic a natural hormone called GLP-1, which helps regulate hunger.
"Long-term administration of GLP-1 concentrations far above than normal could lead to the system to generate a reduced amount of its endogenous hormone, and could reduce responsiveness to its effects," said Dr. Adam Collins, a dietetics expert.
"Withdrawal of this hormone supplement means appetite is unsuppressed, making excessive eating much more probable."
A Lifelong Issue?
Health authorities advise the injections for individuals with weight-linked health risks, accompanied by recommended lifestyle changes.
Many experts say that, given the likelihood of relapse, the therapy is often life-long.
This view is echoed by pharmaceutical companies, who say that the findings "highlight the persistent character of excess weight," comparing it to managing diseases like diabetes.
Patient Testimonies
Users who have come off the jabs report a powerful resurgence of cravings.
"It was like a switch flipping and you're instantly starving," said one woman.
The struggle is compounded if individuals have not developed permanent lifestyle or habit changes during treatment.
Growing Adoption
Figures show that a significant number of people in the UK have tried these injections in the last 12 months, with desire remaining high.
- Adoption is greater among women than males.
- The middle-aged age group shows the highest usage rates.
- Many obtain the drugs through private healthcare rather than public health services.
Ultimately, experts stress that while the jabs are potent agents for weight loss, they are not a standalone solution and long-term success likely depends on integrated lifestyle support.
