New research suggests that people who stop using popular weight-loss injections like Wegovy and Mounjaro can put back on reduced body mass far faster than those who halt traditional lifestyle regimens.
Research printed in a leading health publication shows that while overweight individuals frequently drop a large proportion of their body weight while on the medication, the mass is regained at an estimated rate of 0.8 kg per month once they quit.
"Individuals buying these drugs must be informed of the potential of quick rebound weight gain when the medication concludes," cautioned researcher Dr. Susan Jebb.
That rate of recovery means a reversion to starting mass within about a year and a half.
Comparing Approaches
The study, which examined 37 of trials involving over 9,000 of participants, contrasted the results of GLP-1 agonists with conventional dieting.
Researchers emphasize that people who lose weight through diet and exercise usually experience a less rapid creep back—perhaps 0.1 kg a month—post-intervention.
Understanding the Fast Rebound
Nutrition scientists believe the mechanism of the drugs is key to understanding the amplified weight return.
GLP-1 drugs imitate a body's own chemical called GLP-1, which moderates hunger.
"Long-term administration of GLP-1 concentrations far above than normal could lead to the body to produce less of its own natural GLP-1, and may also diminish responsiveness to its effects," noted Dr. Adam Collins, a nutrition specialist.
"Stopping of this GLP-1 'fix' means appetite is uncontrolled, making binge eating far more likely."
A Chronic Disease?
The NHS advise the jabs for individuals with obesity-related health risks, alongside prescribed diet and exercise modifications.
Many experts contend that, due to the likelihood of relapse, the treatment should be considered ongoing.
This view is supported by pharmaceutical companies, who note that the results "underscore the persistent nature of obesity," comparing it to managing conditions like diabetes.
Patient Experiences
People who have come off the medication explain a sudden resurgence of appetite.
"It was like a switch activating and I was suddenly ravenous," said one woman.
The struggle is worsened if patients have not established permanent dietary or behavioural changes during therapy.
Widespread Use
Figures show that millions of people in the UK have tried these injections in the last 12 months, with interest being substantial.
- Use is higher among women than males.
- The middle-aged demographic shows the highest level of interest.
- Many obtain the drugs through private prescriptions rather than public health services.
Finally, experts caution that while these medications are potent agents for weight loss, they are not a magic cure and lasting health benefits relies on integrated lifestyle support.
