Fresh analysis suggests that people who stop using blockbuster weight-loss injections like Wegovy and Mounjaro may regain shed pounds far faster than those who halt traditional lifestyle programs.
Published data in a leading medical journal points out that while obese individuals often shed a large proportion of their body weight while using the jabs, the mass comes back at an estimated rate of nearly a kilo each month after stopping.
"People purchasing these drugs must be cognizant of the risk of quick rebound weight gain when the treatment ends," warns lead investigator Dr. Susan Jebb.
Such speed of regain implies a return to starting weight within about a year and a half.
Weighing Approaches
The analysis, which looked at 37 of studies involving thousands of patients, contrasted the effects of the injectable medications with older methods.
Scientists note that individuals who shed pounds through lifestyle changes alone typically see a more gradual weight regain—around 0.1 kg a month—post-intervention.
Understanding the Rapid Regain
Doctors suggest the mechanism of the jabs explains the heightened weight return.
These medications mimic a natural hormone called glucagon-like peptide-1, which moderates appetite.
"Sustained high doses of GLP-1 levels several times higher than normal may cause the system to generate a reduced amount of its endogenous hormone, and could lessen sensitivity to its effects," explained Dr. Adam Collins, a nutrition researcher.
"Discontinuation of this hormone supplement results in hunger is unsuppressed, making excessive eating much more probable."
An Ongoing Issue?
Medical guidelines recommend the jabs for individuals with weight-linked health risks, accompanied by prescribed diet and exercise modifications.
Professionals argue that, given the likelihood of weight regain, the therapy is often life-long.
This perspective is echoed by drug manufacturers, who state that the findings "highlight the persistent nature of obesity," comparing it to managing conditions like hypertension.
User Experiences
Individuals who have come off the medication describe a sudden resurgence of appetite.
"It felt as if a trigger flipping and you become extremely hungry," recalled an individual.
This difficulty is compounded if individuals have not adopted sustainable dietary or behavioural changes during treatment.
Growing Interest
Survey data indicate that millions of people in the UK have used these injections in the past year, with interest remaining high.
- Use is higher among women compared to males.
- The 40s and 50s age group shows the highest level of interest.
- A large proportion access the drugs through private healthcare rather than the NHS.
Finally, clinicians emphasize that while these medications are potent tools for weight loss, they are not a magic fix and maintained weight loss relies on combined lifestyle management.
