New research indicates that patients who discontinue popular weight-loss injections like semaglutide or tirzepatide may regain shed pounds at a significantly accelerated pace than those who stop traditional diet and exercise regimens.
Findings released in a major medical journal demonstrates that while obese people often shed about a fifth of their total mass while using the jabs, the weight returns at an estimated rate of 0.8 kg per month after stopping.
"People buying such drugs should be cognizant of the danger of quick rebound weight gain when the therapy is stopped," warns expert Dr. Susan Jebb.
This pace of regain suggests a reversion to original mass in about 18 months.
The research, which looked at dozens of studies involving over 9,000 of patients, contrasted the outcomes of the injectable medications with conventional dieting.
Scientists point out that individuals who shed pounds through lifestyle changes alone usually experience a slower creep back—perhaps 0.1 kg a month—after stopping.
Nutrition scientists suggest the mechanism of the drugs accounts for the accelerated rebound.
The injections mimic a natural hormone called glucagon-like peptide-1, which moderates appetite.
"Sustained high doses of GLP-1 concentrations several times higher than normal may cause the system to produce less of its endogenous GLP-1, and may also lessen responsiveness to its effects," explained Dr. Adam Collins, a dietetics researcher.
"Discontinuation of this GLP-1 'fix' means hunger is uncontrolled, making binge eating much more probable."
Medical guidelines advise the injections for people with obesity-related medical conditions, alongside recommended diet and exercise modifications.
Many experts contend that, considering the high risk of relapse, the treatment might need to be long-term.
This view is echoed by drug manufacturers, who state that the results "highlight the persistent character of excess weight," similar to managing diseases like hypertension.
Individuals who have discontinued the medication report a powerful return of cravings.
"It was like a trigger activating and you're instantly extremely hungry," said an individual.
This difficulty is worsened if individuals have not adopted sustainable lifestyle or habit modifications during treatment.
Recent estimates suggest that millions of adults in the UK have used these injections in the past year, with interest being substantial.
In conclusion, experts emphasize that while GLP-1 drugs are powerful agents for shedding pounds, they are not a magic solution and long-term success hinges on integrated lifestyle support.
Elara Vance is a tech journalist with over a decade of experience covering AI, cybersecurity, and emerging technologies across Europe.