Fresh analysis indicates that patients who come off new GLP-1 drugs like semaglutide or tirzepatide tend to recover lost weight at a significantly accelerated pace than those who halt traditional diet and exercise plans.
Research printed in a leading medical journal shows that while obese people often shed a large proportion of their total mass while undergoing treatment, the mass is regained at an estimated rate of nearly a kilo each month after stopping.
"Individuals buying these drugs should be cognizant of the risk of quick weight regain when the therapy is stopped," stated lead investigator Dr. Susan Jebb.
This pace of recovery suggests a reversion to starting weight within about 18 months.
The research, which examined 37 of studies involving thousands of patients, contrasted the effects of the injectable medications with conventional dieting.
Scientists point out that individuals who lose weight through diet and exercise generally have a more gradual creep back—approximately 100 grams monthly—after stopping.
Experts believe the mode of action of the jabs explains the heightened regain.
The injections copy a body's own chemical called glucagon-like peptide-1, which moderates appetite.
"Sustained high doses of the hormone concentrations far above than normal might result in the system to generate a reduced amount of its endogenous hormone, and could lessen responsiveness to its effects," said Dr. Adam Collins, a nutrition expert.
"Withdrawal of this hormone supplement leads to hunger is no longer kept in check, making overeating a significant risk."
Medical guidelines suggest the injections for people with obesity-related health risks, alongside recommended lifestyle changes.
Many experts say that, considering the significant potential of relapse, the treatment is often long-term.
This opinion is echoed by pharmaceutical companies, who say that the results "highlight the chronic nature of excess weight," similar to managing diseases like hypertension.
Individuals who have come off the jabs report a intense return of appetite.
"It was like something that goes on and you become starving," said one woman.
This difficulty is compounded if users have not established permanent lifestyle or habit modifications during therapy.
Recent estimates indicate that a significant number of people in the UK have used these injections in the last 12 months, with demand being substantial.
In conclusion, researchers stress that while the jabs are potent agents for shedding pounds, they are not a permanent cure and lasting health benefits hinges on combined lifestyle changes.