New research indicates that people who stop using blockbuster GLP-1 drugs like Mounjaro or Wegovy can put back on reduced body mass at a significantly accelerated pace than those who halt traditional lifestyle programs.
Findings released in a prominent health publication shows that while obese people can lose about a fifth of their total mass while on the medication, the mass returns at an average rate of nearly a kilo each month after stopping.
"Individuals purchasing such treatments need to be aware of the risk of fast rebound weight gain when the medication concludes," stated expert Dr. Susan Jebb.
Such speed of recovery suggests a return to pre-treatment weight within about 18 months.
Analyzing Treatments
The analysis, which examined 37 of studies involving thousands of participants, contrasted the effects of these new drugs with other pills.
Scientists note that individuals who lose weight through dieting typically have a less rapid weight regain—approximately 100 grams monthly—after stopping.
Understanding the Fast Regain
Experts suggest the mechanism of the injections is key to understanding the amplified regain.
These medications copy a natural hormone called glucagon-like peptide-1, which moderates appetite.
"Long-term administration of the hormone concentrations several times higher than the body's typical production could lead to the system to produce less of its own natural hormone, and may also reduce responsiveness to its effects," noted Dr. Adam Collins, a dietetics expert.
"Discontinuation of this GLP-1 'fix' leads to appetite is uncontrolled, making overeating much more probable."
A Lifelong Disease?
The NHS recommend the injections for people with obesity-related medical conditions, alongside prescribed diet and exercise modifications.
Professionals argue that, due to the high risk of weight regain, the treatment should be considered ongoing.
This perspective is reinforced by pharmaceutical companies, who state that the results "highlight the persistent nature of obesity," similar to managing diseases like diabetes.
Patient Accounts
Users who have come off the medication explain a sudden return of appetite.
"It was like something that goes on and you become ravenous," described an individual.
The struggle is worsened if patients have not adopted lasting dietary or behavioural modifications during therapy.
Widespread Use
Recent estimates suggest that millions of people in the UK have used weight-loss jabs in the last 12 months, with demand continuing to grow.
- Use is greater among women compared to men.
- The 40s and 50s age group shows the greatest level of interest.
- Many access the drugs through private healthcare rather than public health services.
Finally, experts emphasize that while the jabs are powerful agents for shedding pounds, they are not a magic fix and long-term success hinges on integrated behavioural support.
