Fresh analysis suggests that individuals who come off new weight-loss injections like semaglutide or tirzepatide can put back on reduced body mass at a significantly accelerated pace than those who stop traditional diet and exercise regimens.
Published data in a prominent health publication points out that while obese individuals often shed about a fifth of their total mass while on the medication, the mass is regained at an estimated rate of 0.8 kg per month upon discontinuation.
"Individuals buying these treatments should be informed of the risk of fast rebound weight gain when the therapy is stopped," stated lead investigator Dr. Susan Jebb.
Such speed of recovery implies a reversion to original weight within about 18 months.
Analyzing Therapies
The research, which examined dozens of studies involving thousands of participants, contrasted the results of GLP-1 agonists with other pills.
The team emphasize that people who shed pounds through lifestyle changes alone generally see a more gradual weight regain—perhaps 0.1 kg a month—after stopping.
Explaining the Rapid Regain
Nutrition scientists suggest the mode of action of the jabs is key to understanding the accelerated regain.
GLP-1 drugs mimic a body's own chemical called glucagon-like peptide-1, which controls hunger.
"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 own natural hormone, and could diminish responsiveness to its effects," said Dr. Adam Collins, a dietetics researcher.
"Stopping of this GLP-1 'fix' leads to appetite is unsuppressed, making overeating far more likely."
A Chronic Disease?
Health authorities suggest the jabs for individuals with obesity-related medical conditions, alongside prescribed lifestyle changes.
Many experts say that, given the likelihood of weight regain, the therapy should be considered long-term.
This perspective is supported by drug manufacturers, who state that the results "highlight the long-term nature of excess weight," akin to managing diseases like high blood pressure.
Patient Experiences
Users who have come off the jabs explain a intense return of cravings.
"It felt as if a switch that goes on and you're instantly ravenous," described one woman.
This challenge is compounded if patients have not adopted permanent dietary or behavioural changes during treatment.
Widespread Use
Figures suggest that millions of adults in the UK have tried weight-loss jabs in the past year, with demand being substantial.
- Use is higher among females than males.
- The middle-aged age group shows the greatest level of interest.
- Many access the medications through private prescriptions rather than public health services.
Ultimately, experts stress that while these medications are powerful tools for weight loss, they are not a permanent fix and lasting health benefits hinges on integrated lifestyle support.
