A recent study reveals that individuals who discontinue new weight-loss injections like Mounjaro or Wegovy can put back on reduced body mass far faster than those who halt conventional diet and exercise programs.
Research printed in a major medical journal demonstrates that while obese individuals often shed about a fifth of their total mass while on the medication, the weight comes back at an average rate of 0.8 kg per month upon discontinuation.
"People purchasing such medications must be cognizant of the potential of rapid weight regain when the therapy ends," stated lead investigator Dr. Susan Jebb.
This pace of recovery suggests a return to starting weight in about 18 months.
Comparing Therapies
The analysis, which looked at dozens of studies involving thousands of participants, compared the effects of GLP-1 agonists with other pills.
The team note that individuals who shed pounds through diet and exercise usually see a more gradual weight regain—approximately 100 grams monthly—post-intervention.
Understanding the Rapid Regain
Experts suggest the mechanism of the injections accounts for the amplified regain.
These medications mimic a natural hormone called GLP-1, which helps regulate hunger.
"Sustained high doses of the hormone concentrations several times higher than normal may cause the body to produce less of its own natural GLP-1, and may also reduce sensitivity to its actions," explained Dr. Adam Collins, a nutrition researcher.
"Withdrawal of this GLP-1 'fix' results in appetite is no longer kept in check, making overeating much more probable."
A Chronic Condition?
The NHS advise the jabs for individuals with obesity-related medical conditions, accompanied by recommended diet and exercise modifications.
Many experts contend that, considering the likelihood of relapse, the treatment should be considered ongoing.
This view is reinforced by pharmaceutical companies, who state that the results "emphasize the persistent nature of obesity," comparing it to managing conditions like high blood pressure.
Patient Experiences
Users who have stopped the medication report a sudden return of hunger.
"It felt as if a switch flipping and I was suddenly starving," described one woman.
The struggle is worsened if patients have not established permanent dietary or behavioural changes during therapy.
Widespread Use
Figures indicate that a significant number of adults in the UK have used weight-loss jabs in the last 12 months, with interest being substantial.
- Adoption is greater among females than men.
- The 40s and 50s age group shows the highest usage rates.
- Many access the medications through private healthcare rather than the NHS.
Ultimately, clinicians stress that while these medications are powerful tools for shedding pounds, they are not a permanent fix and maintained weight loss hinges on ongoing behavioural changes.
