A recent study suggests that patients who stop using new slimming jabs like Wegovy and Mounjaro may regain lost weight at a significantly accelerated pace than those who stop conventional diet and exercise plans.
Published data in a leading health publication points out that while overweight individuals often shed about a fifth of their body weight while on the medication, the mass is regained at an estimated rate of 0.8 kg per month upon discontinuation.
"People purchasing these treatments must be cognizant of the danger of rapid weight regain when the therapy ends," stated lead investigator Dr. Susan Jebb.
This pace of recovery means a return to original mass in about one and a half years.
Weighing Therapies
The research, which looked at 37 of studies involving over 9,000 of participants, compared the results of GLP-1 agonists with other pills.
The team point out that people who lose weight through lifestyle changes alone generally have a slower creep back—perhaps 0.1 kg a month—post-intervention.
The Reason for the Fast Regain
Doctors believe the mechanism of the injections accounts for the heightened weight return.
GLP-1 drugs imitate a body's own chemical called GLP-1, which controls appetite.
"Sustained high doses of the hormone levels several times higher than the body's typical production could lead to the system to generate a reduced amount of its endogenous hormone, and could reduce sensitivity to its actions," noted Dr. Adam Collins, a nutrition expert.
"Stopping of this GLP-1 'fix' results in appetite is uncontrolled, making excessive eating much more probable."
A Chronic Condition?
Health authorities advise the jabs for individuals with obesity-related medical conditions, accompanied by prescribed diet and exercise modifications.
Many experts contend that, considering the high risk of weight regain, the therapy should be considered ongoing.
This perspective is reinforced by pharmaceutical companies, who say that the findings "underscore the chronic character of obesity," comparing it to managing diseases like high blood pressure.
Patient Accounts
Users who have stopped the medication explain a sudden return of hunger.
"It was like a trigger flipping and you're instantly starving," said one woman.
The struggle is exacerbated if users have not adopted permanent lifestyle or habit changes during treatment.
Growing Adoption
Recent estimates indicate that a significant number of adults in the UK have tried these injections in the last 12 months, with interest remaining high.
- Use is higher among females than men.
- The middle-aged age group shows the highest level of interest.
- Many obtain the drugs through private healthcare rather than public health services.
Ultimately, researchers caution that while GLP-1 drugs are powerful agents for weight loss, they are not a magic fix and lasting health benefits relies on integrated behavioural management.
