Fresh analysis indicates that patients who come off new weight-loss injections like Wegovy and Mounjaro may regain reduced body mass at a significantly accelerated pace than those who end conventional diet and exercise regimens.
Published data in a leading medical journal demonstrates that while obese people frequently drop about a fifth of their total mass while using the jabs, the mass comes back at an estimated rate of nearly a kilo each month after stopping.
"Users purchasing such medications need to be informed of the potential of rapid rebound weight gain when the treatment is stopped," warns lead investigator Dr. Susan Jebb.
Such speed of regain means a return to pre-treatment mass in about one and a half years.
Comparing Treatments
The research, which looked at 37 of trials involving over 9,000 of participants, compared the outcomes of these new drugs with older methods.
Scientists point out that people who lose weight through dieting generally have a slower weight regain—approximately 100 grams monthly—after stopping.
Explaining the Fast Rebound
Doctors suggest the mechanism of the drugs explains the accelerated rebound.
The injections imitate a natural hormone called GLP-1, which helps regulate appetite.
"Artificially providing GLP-1 levels several times higher than normal may cause the system to produce less of its own natural hormone, and may also lessen sensitivity to its effects," said Dr. Adam Collins, a dietetics expert.
"Withdrawal of this GLP-1 'fix' results in hunger is no longer kept in check, making overeating far more likely."
An Ongoing Disease?
The NHS advise the jabs for individuals with obesity-related medical conditions, accompanied by prescribed diet and exercise modifications.
A number of clinicians argue that, considering the significant potential of weight regain, the treatment should be considered life-long.
This view is echoed by pharmaceutical companies, who say that the findings "emphasize the chronic character of excess weight," comparing it to managing diseases like hypertension.
Patient Experiences
People who have come off the jabs report a sudden return of cravings.
"I experienced a trigger flipping and you're instantly extremely hungry," said one woman.
This challenge is compounded if users have not adopted lasting lifestyle or habit modifications during therapy.
Significant Adoption
Recent estimates indicate that millions of adults in the UK have used weight-loss jabs in the last 12 months, with interest remaining high.
- Use is more common among females than men.
- The 40s and 50s demographic shows the highest usage rates.
- Many access the drugs through private healthcare rather than the NHS.
Finally, researchers stress that while these medications are effective tools for weight loss, they are not a permanent cure and maintained weight loss relies on ongoing behavioural management.
