New research reveals that patients who stop using blockbuster weight-loss injections like semaglutide or tirzepatide may regain lost weight much more quickly than those who stop traditional diet and exercise regimens.
Published data in a leading health publication demonstrates that while overweight people often shed about a fifth of their total mass while undergoing treatment, the weight is regained at an estimated rate of nearly a kilo each month upon discontinuation.
"Individuals buying these medications need to be cognizant of the danger of quick weight regain when the medication is stopped," cautioned lead investigator Dr. Susan Jebb.
Such speed of regain means a return to original weight within about 18 months.
Weighing Therapies
The study, which reviewed dozens of trials involving thousands of patients, contrasted the outcomes of GLP-1 agonists with other pills.
Scientists note that individuals who lose weight through lifestyle changes alone generally see a less rapid weight regain—perhaps 100 grams monthly—once they finish.
Understanding the Quick Regain
Doctors suggest the mode of action of the injections explains the amplified regain.
The injections mimic a body's own chemical called GLP-1, which controls appetite.
"Long-term administration of GLP-1 concentrations far above than the body's typical production may cause the system to produce less of its endogenous GLP-1, and may also diminish responsiveness to its effects," said Dr. Adam Collins, a nutrition researcher.
"Stopping of this hormone supplement means hunger is no longer kept in check, making excessive eating much more probable."
A Lifelong Issue?
Medical guidelines recommend the injections for individuals with weight-linked health risks, alongside recommended diet and exercise modifications.
A number of clinicians say that, considering the likelihood of relapse, the therapy might need to be long-term.
This opinion is reinforced by pharmaceutical companies, who state that the results "underscore the persistent character of excess weight," comparing it to managing diseases like diabetes.
User Accounts
Individuals who have stopped the jabs explain a sudden return of appetite.
"I experienced a switch flipping and you become extremely hungry," described a patient.
The struggle is worsened if patients have not adopted lasting lifestyle or habit modifications during therapy.
Significant Use
Survey data suggest that millions of adults in the UK have used weight-loss jabs in the past year, with interest remaining high.
- Use is greater among women compared to men.
- The 40s and 50s age group shows the greatest level of interest.
- Many access the medications through private healthcare rather than public health services.
Ultimately, researchers emphasize that while the jabs are effective tools for weight loss, they are not a standalone solution and long-term success relies on combined behavioural management.
