Fresh analysis suggests that individuals who stop using blockbuster GLP-1 drugs like Wegovy and Mounjaro can put back on lost weight far faster than those who halt traditional lifestyle programs.
Published data in a leading medical journal shows that while obese individuals frequently drop substantial amounts of their total mass while undergoing treatment, the weight returns at an estimated rate of 0.8 kg per month upon discontinuation.
"Individuals purchasing such drugs must be cognizant of the risk of fast weight regain when the therapy ends," stated lead investigator Dr. Susan Jebb.
Such speed of recovery means a return to pre-treatment mass in about a year and a half.
Analyzing Treatments
The study, which examined dozens of trials involving over 9,000 of patients, compared the outcomes of GLP-1 agonists with conventional dieting.
Scientists emphasize that individuals who shed pounds through lifestyle changes alone usually experience a more gradual creep back—around 0.1 kg a month—after stopping.
Understanding the Fast Rebound
Experts believe the mode of action of the drugs is key to understanding the amplified regain.
The injections mimic a natural hormone called GLP-1, which moderates hunger.
"Long-term administration of GLP-1 levels several times higher than the body's typical production may cause the body to generate a reduced amount of its endogenous GLP-1, and may also reduce sensitivity to its effects," said Dr. Adam Collins, a nutrition specialist.
"Withdrawal of this medication results in appetite is unsuppressed, making binge eating far more likely."
A Lifelong Disease?
The NHS recommend the injections for individuals with obesity-related health risks, alongside recommended lifestyle changes.
Professionals argue that, considering the high risk of relapse, the therapy might need to be ongoing.
This perspective is reinforced by drug manufacturers, who state that the results "underscore the persistent character of excess weight," similar to managing conditions like high blood pressure.
Patient Accounts
People who have come off the jabs explain a powerful return of hunger.
"It felt as if something that goes on and you become starving," described a patient.
This difficulty is worsened if individuals have not developed permanent dietary or behavioural modifications during treatment.
Significant Adoption
Recent estimates show that a significant number of adults in the UK have tried weight-loss jabs in the past year, with desire remaining high.
- Adoption is more common among women than males.
- The 40s and 50s age group shows the highest usage rates.
- Many access the drugs through private healthcare rather than the NHS.
Ultimately, researchers caution that while GLP-1 drugs are powerful agents for shedding pounds, they are not a standalone fix and maintained weight loss likely depends on integrated lifestyle changes.
