Fresh analysis reveals that patients who discontinue popular GLP-1 drugs like semaglutide or tirzepatide may regain reduced body mass far faster than those who end conventional diet and exercise regimens.
Findings released in a major health publication demonstrates that while overweight people frequently drop about a fifth of their body weight while on the medication, the mass comes back at an estimated rate of nearly a kilo each month upon discontinuation.
"People purchasing these treatments need to be informed of the potential of fast rebound weight gain when the therapy concludes," stated lead investigator Dr. Susan Jebb.
Such speed of regain means a return to starting weight within about a year and a half.
Comparing Therapies
The study, which looked at 37 of trials involving thousands of participants, contrasted the effects of these new drugs with older methods.
Scientists point out that people who shed pounds through diet and exercise generally see a slower weight regain—around 0.1 kg a month—once they finish.
The Reason for the Rapid Rebound
Nutrition scientists believe the mechanism of the injections is key to understanding the accelerated regain.
The injections copy a body's own chemical called glucagon-like peptide-1, which controls hunger.
"Artificially providing the hormone concentrations far above than the body's typical production might result in the body to produce less of its own natural GLP-1, and may also diminish responsiveness to its effects," explained Dr. Adam Collins, a nutrition specialist.
"Withdrawal of this medication means appetite is no longer kept in check, making excessive eating much more probable."
An Ongoing Issue?
Health authorities advise the jabs for people with weight-linked medical conditions, accompanied by recommended lifestyle changes.
A number of clinicians say that, due to the high risk of relapse, the therapy is often ongoing.
This view is echoed by drug manufacturers, who note that the results "underscore the long-term character of obesity," akin to managing diseases like high blood pressure.
User Testimonies
People who have come off the medication report a sudden return of hunger.
"I experienced a switch that goes on and you become starving," recalled a patient.
This difficulty is compounded if users have not established permanent dietary or behavioural modifications during therapy.
Growing Adoption
Recent estimates show that millions of adults in the UK have used these injections in the past year, with interest remaining high.
- Adoption is higher among females than males.
- The 40s and 50s demographic shows the highest level of interest.
- A large proportion obtain the medications through private prescriptions rather than the NHS.
Ultimately, clinicians emphasize that while the jabs are effective agents for weight loss, they are not a standalone cure and maintained weight loss relies on combined behavioural management.
