Fresh analysis indicates that individuals who come off new GLP-1 drugs like semaglutide or tirzepatide can put back on reduced body mass far faster than those who end conventional diet and exercise programs.
Findings released in a major medical journal points out that while obese individuals often shed substantial amounts of their total mass while using the jabs, the weight comes back at an average rate of 0.8 kg per month upon discontinuation.
"Users using these drugs need to be cognizant of the danger of rapid weight regain when the medication is stopped," warns expert Dr. Susan Jebb.
This pace of regain suggests a reversion to starting weight within about one and a half years.
The analysis, which examined 37 of studies involving thousands of participants, contrasted the results of these new drugs with conventional dieting.
Scientists point out that people who shed pounds through lifestyle changes alone generally experience a less rapid creep back—around 0.1 kg a month—once they finish.
Nutrition scientists propose the way of the drugs accounts for the amplified regain.
GLP-1 drugs copy a natural hormone called GLP-1, which helps regulate appetite.
"Sustained high doses of the hormone concentrations several times higher than normal may cause the system to produce less of its endogenous GLP-1, and may also diminish sensitivity to its actions," explained Dr. Adam Collins, a nutrition expert.
"Stopping of this GLP-1 'fix' means hunger is unsuppressed, making overeating far more likely."
Health authorities advise the injections for people with obesity-related medical conditions, accompanied by prescribed lifestyle changes.
Many experts argue that, due to the significant potential of relapse, the therapy might need to be life-long.
This view is reinforced by pharmaceutical companies, who state that the findings "highlight the persistent nature of excess weight," akin to managing diseases like diabetes.
Individuals who have come off the medication explain a sudden resurgence of appetite.
"It was like something activating and you're instantly ravenous," described an individual.
This difficulty is compounded if individuals have not adopted sustainable dietary or behavioural changes during treatment.
Figures show that millions of adults in the UK have tried weight-loss jabs in the past year, with desire remaining high.
In conclusion, researchers emphasize that while the jabs are potent agents for shedding pounds, they are not a magic cure and long-term success hinges on combined lifestyle changes.