New research reveals that patients who stop using new weight-loss injections like semaglutide or tirzepatide can put back on reduced body mass far faster than those who halt conventional lifestyle programs.
Published data in a prominent medical journal shows that while overweight people often shed substantial amounts of their body weight while undergoing treatment, the weight is regained at an estimated rate of 0.8 kg per month upon discontinuation.
"People purchasing such medications must be cognizant of the risk of fast weight regain when the medication is stopped," warns lead investigator Dr. Susan Jebb.
Such speed of recovery suggests a reversion to pre-treatment mass in about one and a half years.
Comparing Approaches
The analysis, which examined dozens of studies involving over 9,000 of patients, contrasted the results of these new drugs with older methods.
Scientists note that people who lose weight through lifestyle changes alone usually see a less rapid weight regain—perhaps 100 grams monthly—after stopping.
The Reason for the Quick Regain
Experts believe the mode of action of the drugs accounts for the amplified rebound.
The injections copy a natural hormone called GLP-1, which helps regulate hunger.
"Artificially providing GLP-1 concentrations far above than normal could lead to the system to produce less of its endogenous GLP-1, and could reduce responsiveness to its effects," explained Dr. Adam Collins, a nutrition researcher.
"Discontinuation of this GLP-1 'fix' results in appetite is unsuppressed, making binge eating far more likely."
A Chronic Disease?
The NHS advise the injections for people with obesity-related health risks, accompanied by recommended diet and exercise modifications.
A number of clinicians argue that, given the high risk of relapse, the treatment might need to be life-long.
This view is echoed by pharmaceutical companies, who say that the results "underscore the persistent character of obesity," akin to managing diseases like high blood pressure.
Patient Testimonies
Individuals who have stopped the jabs explain a powerful resurgence of hunger.
"It was like something activating and you become extremely hungry," recalled one woman.
This difficulty is exacerbated if individuals have not developed permanent dietary or behavioural changes during treatment.
Widespread Adoption
Survey data show that a significant number of adults in the UK have tried weight-loss jabs in the past year, with demand being substantial.
- Adoption is greater among women than males.
- The 40s and 50s demographic shows the greatest level of interest.
- A large proportion obtain the drugs through private healthcare rather than public health services.
Finally, experts caution that while these medications are powerful tools for shedding pounds, they are not a permanent fix and long-term success relies on combined lifestyle support.
