New research reveals that individuals who stop using new GLP-1 drugs like Wegovy and Mounjaro may regain reduced body mass far faster than those who stop conventional diet and exercise regimens.
Published data in a leading medical journal shows that while overweight people frequently drop about a fifth of their body weight while undergoing treatment, the weight is regained at an estimated rate of 0.8 kg per month once they quit.
"Individuals using such medications should be aware of the potential of quick weight regain when the medication concludes," warns lead investigator Dr. Susan Jebb.
That rate of regain means a reversion to starting mass in about one and a half years.
Analyzing Treatments
The study, which reviewed 37 of studies involving thousands of patients, compared the outcomes of the injectable medications with other pills.
Scientists emphasize that people who shed pounds through lifestyle changes alone usually have a less rapid weight regain—around 100 grams monthly—post-intervention.
The Reason for the Rapid Rebound
Nutrition scientists propose the mode of action of the drugs explains the amplified rebound.
GLP-1 drugs mimic a body's own chemical called GLP-1, which helps regulate appetite.
"Long-term administration of the hormone concentrations several times higher than the body's typical production could lead to the body to produce less of its endogenous hormone, and could diminish responsiveness to its effects," said Dr. Adam Collins, a nutrition researcher.
"Stopping of this GLP-1 'fix' means appetite is unsuppressed, making excessive eating much more probable."
A Lifelong Condition?
Medical guidelines suggest the injections for people with obesity-related health risks, alongside prescribed lifestyle changes.
Professionals contend that, given the likelihood of weight regain, the therapy is often long-term.
This opinion is echoed by drug manufacturers, who state that the findings "emphasize the long-term nature of obesity," similar to managing conditions like high blood pressure.
Patient Experiences
Individuals who have come off the jabs report a sudden resurgence of cravings.
"It felt as if something that goes on and you're instantly starving," said one woman.
The struggle is worsened if users have not adopted sustainable dietary or behavioural changes during treatment.
Significant Interest
Survey data show that a significant number of people in the UK have tried weight-loss jabs in the last 12 months, with interest remaining high.
- Adoption is higher among females than males.
- The 40s and 50s age group shows the highest usage rates.
- A large proportion access the drugs through private healthcare rather than public health services.
Finally, researchers stress that while the jabs are effective agents for weight loss, they are not a magic solution and lasting health benefits relies on ongoing lifestyle changes.
