New research reveals that individuals who come off new weight-loss injections like semaglutide or tirzepatide may regain reduced body mass much more quickly than those who end traditional diet and exercise programs.
Published data in a leading medical journal demonstrates that while overweight individuals often shed about a fifth of their total mass while using the jabs, the weight is regained at an average rate of nearly a kilo each month once they quit.
"People purchasing such medications should be aware of the potential of rapid rebound weight gain when the medication is stopped," warns expert Dr. Susan Jebb.
That rate of regain implies a reversion to original weight in about a year and a half.
Weighing Approaches
The analysis, which reviewed 37 of studies involving thousands of patients, contrasted the effects of GLP-1 agonists with older methods.
Scientists emphasize that people who lose weight through lifestyle changes alone typically experience a slower weight regain—approximately 0.1 kg a month—post-intervention.
The Reason for the Quick Rebound
Doctors propose the mode of action of the injections is key to understanding the amplified regain.
GLP-1 drugs copy a body's own chemical called GLP-1, which helps regulate hunger.
"Artificially providing GLP-1 concentrations far above than normal could lead to the system to produce less of its endogenous GLP-1, and could diminish sensitivity to its actions," said Dr. Adam Collins, a nutrition researcher.
"Stopping of this GLP-1 'fix' leads to hunger is uncontrolled, making binge eating far more likely."
An Ongoing Disease?
Health authorities advise the injections for individuals with obesity-related medical conditions, alongside recommended lifestyle changes.
Many experts argue that, given the high risk of relapse, the treatment is often long-term.
This view is supported by drug manufacturers, who note that the results "emphasize the long-term character of excess weight," akin to managing diseases like high blood pressure.
Patient Experiences
Users who have come off the medication describe a powerful resurgence of hunger.
"It was like something that goes on and you become starving," recalled an individual.
The struggle is exacerbated if users have not adopted permanent lifestyle or habit modifications during therapy.
Significant Interest
Survey data indicate that millions of adults in the UK have tried these injections in the past year, with desire being substantial.
- Use is greater among females than males.
- The 40s and 50s demographic shows the highest level of interest.
- A large proportion obtain the medications through private prescriptions rather than public health services.
Ultimately, experts emphasize that while the jabs are powerful tools for weight loss, they are not a magic solution and maintained weight loss likely depends on combined behavioural support.
