Fresh analysis reveals that patients who stop using blockbuster weight-loss injections like Wegovy and Mounjaro tend to recover reduced body mass far faster than those who halt conventional diet and exercise plans.
Published data in a leading medical journal points out that while obese individuals often shed a large proportion of their total mass while on the medication, the mass comes back at an average rate of 0.8 kg per month once they quit.
"People using these medications should be informed of the danger of rapid rebound weight gain when the treatment is stopped," cautioned lead investigator Dr. Susan Jebb.
This pace of regain means a reversion to pre-treatment mass within about one and a half years.
Weighing Therapies
The analysis, which examined 37 of studies involving thousands of patients, contrasted the outcomes of these new drugs with conventional dieting.
Scientists point out that people who lose weight through lifestyle changes alone typically experience a more gradual creep back—around 100 grams monthly—once they finish.
The Reason for the Quick Regain
Nutrition scientists propose the mode of action of the drugs is key to understanding the amplified rebound.
GLP-1 drugs imitate a natural hormone called GLP-1, which controls hunger.
"Long-term administration of the hormone concentrations far above than the body's typical production might result in the system to produce less of its own natural hormone, and could lessen responsiveness to its actions," said Dr. Adam Collins, a nutrition specialist.
"Withdrawal of this GLP-1 'fix' leads to appetite is no longer kept in check, making binge eating much more probable."
A Chronic Issue?
Medical guidelines advise the injections for people with obesity-related health risks, accompanied by prescribed lifestyle changes.
Many experts say that, given the likelihood of weight regain, the therapy is often life-long.
This perspective is supported by pharmaceutical companies, who note that the results "underscore the chronic character of excess weight," comparing it to managing diseases like high blood pressure.
Patient Accounts
People who have discontinued the jabs explain a intense resurgence of hunger.
"It was like a switch activating and you become starving," said an individual.
The struggle is exacerbated if individuals have not adopted sustainable dietary or behavioural changes during treatment.
Growing Adoption
Survey data show that millions of adults in the UK have used weight-loss jabs in the past year, with interest remaining high.
- Use is greater among women compared to men.
- The 40s and 50s demographic shows the highest level of interest.
- A large proportion access the medications through private healthcare rather than public health services.
Ultimately, clinicians caution that while the jabs are powerful tools for shedding pounds, they are not a standalone solution and maintained weight loss relies on ongoing lifestyle management.
