Fresh analysis reveals that patients who stop using blockbuster weight-loss injections like Wegovy and Mounjaro tend to recover shed pounds far faster than those who stop conventional diet and exercise regimens.
Research printed in a major medical journal shows that while overweight individuals can lose a large proportion of their total mass while on the medication, the weight comes back at an average rate of nearly a kilo each month after stopping.
"Individuals buying these treatments need to be cognizant of the danger of fast rebound weight gain when the therapy ends," stated researcher Dr. Susan Jebb.
This pace of recovery means a reversion to pre-treatment mass within about one and a half years.
Comparing Therapies
The research, which reviewed dozens of studies involving over 9,000 of participants, contrasted the results of the injectable medications with other pills.
Scientists emphasize that individuals who lose weight through diet and exercise generally experience a slower creep back—around 100 grams monthly—post-intervention.
The Reason for the Rapid Rebound
Experts believe the mode of action of the drugs explains the heightened rebound.
The injections mimic a natural hormone called GLP-1, which controls appetite.
"Artificially providing GLP-1 concentrations far above than normal may cause the system to generate a reduced amount of its own natural GLP-1, and may also lessen sensitivity to its effects," said Dr. Adam Collins, a nutrition researcher.
"Stopping of this GLP-1 'fix' leads to appetite is uncontrolled, making binge eating far more likely."
A Lifelong Issue?
Health authorities suggest the jabs for individuals with weight-linked medical conditions, accompanied by prescribed diet and exercise modifications.
Professionals say that, considering the significant potential of relapse, the therapy might need to be life-long.
This opinion is reinforced by pharmaceutical companies, who note that the results "highlight the long-term nature of obesity," similar to managing conditions like high blood pressure.
Patient Testimonies
Individuals who have stopped the medication explain a intense return of cravings.
"It felt as if something that goes on and I was suddenly extremely hungry," recalled one woman.
The struggle is compounded if patients have not developed lasting dietary or behavioural modifications during treatment.
Growing Use
Figures suggest that millions of adults in the UK have used these injections in the past year, with interest being substantial.
- Use is higher among women than men.
- The middle-aged age group shows the greatest level of interest.
- A large proportion access the drugs through private prescriptions rather than the NHS.
Ultimately, experts stress that while GLP-1 drugs are powerful tools for shedding pounds, they are not a permanent solution and long-term success hinges on combined lifestyle management.
