Fresh analysis indicates that people who come off blockbuster GLP-1 drugs like Mounjaro or Wegovy can put back on lost weight much more quickly than those who stop conventional diet and exercise plans.
Published data in a major medical journal demonstrates that while obese individuals frequently drop a large proportion of their body weight while using the jabs, the mass comes back at an estimated rate of 0.8 kg per month once they quit.
"Users purchasing such medications must be aware of the danger of fast weight regain when the medication ends," warns lead investigator Dr. Susan Jebb.
This pace of recovery suggests a reversion to pre-treatment mass in about 18 months.
Comparing Approaches
The study, which examined dozens of trials involving thousands of patients, compared the outcomes of these new drugs with conventional dieting.
Researchers note that people who lose weight through diet and exercise typically have a slower weight regain—perhaps 100 grams monthly—post-intervention.
Explaining the Rapid Rebound
Nutrition scientists believe the way of the jabs is key to understanding the accelerated regain.
The injections copy a body's own chemical called GLP-1, which moderates appetite.
"Artificially providing GLP-1 levels far above than the body's typical production might result in the system to produce less of its own natural GLP-1, and may also lessen sensitivity to its actions," said Dr. Adam Collins, a nutrition researcher.
"Stopping of this hormone supplement leads to hunger is unsuppressed, making excessive eating far more likely."
A Lifelong Issue?
The NHS suggest the jabs for people with weight-linked medical conditions, alongside prescribed diet and exercise modifications.
A number of clinicians say that, due to the significant potential of relapse, the therapy is often life-long.
This perspective is reinforced by drug manufacturers, who note that the findings "underscore the long-term nature of excess weight," comparing it to managing diseases like high blood pressure.
User Accounts
Individuals who have come off the medication report a sudden resurgence of cravings.
"It felt as if something activating and you become starving," said one woman.
This challenge is worsened if patients have not developed sustainable dietary or behavioural changes during therapy.
Widespread Interest
Recent estimates show that millions of people in the UK have tried weight-loss jabs in the past year, with desire continuing to grow.
- Adoption is higher among females compared to males.
- The middle-aged demographic shows the greatest level of interest.
- Many obtain the drugs through private healthcare rather than public health services.
Finally, clinicians stress that while these medications are powerful agents for weight loss, they are not a standalone cure and long-term success hinges on combined behavioural support.
