Fresh analysis suggests that individuals who come off popular GLP-1 drugs like Mounjaro or Wegovy tend to recover lost weight much more quickly than those who end traditional lifestyle plans.
Research printed in a major medical journal shows that while obese people can lose about a fifth of their total mass while undergoing treatment, the weight is regained at an average rate of 0.8 kg per month once they quit.
"People using these drugs should be informed of the risk of fast weight regain when the therapy is stopped," warns researcher Dr. Susan Jebb.
That rate of recovery means a return to pre-treatment mass within about 18 months.
Weighing Therapies
The research, which looked at dozens of studies involving thousands of participants, compared the outcomes of GLP-1 agonists with conventional dieting.
Scientists emphasize that individuals who shed pounds through dieting usually see a slower creep back—perhaps 0.1 kg a month—once they finish.
The Reason for the Rapid Regain
Doctors suggest the way of the jabs explains the accelerated rebound.
The injections mimic a natural hormone called glucagon-like peptide-1, which helps regulate feelings of fullness.
"Long-term administration of the hormone concentrations far above than normal may cause the system to produce less of its own natural GLP-1, and could diminish responsiveness to its effects," said Dr. Adam Collins, a dietetics researcher.
"Discontinuation of this hormone supplement leads to appetite is uncontrolled, making overeating far more likely."
A Lifelong Disease?
Medical guidelines recommend the jabs for people with obesity-related health risks, alongside prescribed diet and exercise modifications.
Professionals argue that, given the likelihood of weight regain, the therapy might need to be life-long.
This opinion is echoed by drug manufacturers, who note that the results "underscore the long-term nature of obesity," akin to managing conditions like diabetes.
User Accounts
Users who have discontinued the medication describe a powerful resurgence of appetite.
"It was like a trigger that goes on and you become ravenous," said one woman.
The struggle is exacerbated if individuals have not developed permanent dietary or behavioural modifications during therapy.
Widespread Adoption
Survey data suggest that a significant number of people in the UK have used these injections in the past year, with interest continuing to grow.
- Use is more common among women compared to males.
- The 40s and 50s demographic shows the highest level of interest.
- Many access the drugs through private prescriptions rather than the NHS.
Finally, experts stress that while these medications are potent tools for weight loss, they are not a permanent cure and lasting health benefits relies on integrated behavioural support.
