New research indicates that patients who stop using new GLP-1 drugs like semaglutide or tirzepatide may regain shed pounds much more quickly than those who end conventional diet and exercise programs.
Research printed in a prominent medical journal shows that while overweight people can lose substantial amounts of their body weight while using the jabs, the mass is regained at an estimated rate of nearly a kilo each month once they quit.
"Individuals buying these medications need to be cognizant of the potential of fast rebound weight gain when the therapy concludes," stated lead investigator Dr. Susan Jebb.
This pace of regain suggests a return to original weight in about one and a half years.
Comparing Approaches
The analysis, which examined 37 of studies involving over 9,000 of patients, contrasted the outcomes of these new drugs with other pills.
Scientists note that individuals who lose weight through lifestyle changes alone typically experience a slower creep back—around 0.1 kg a month—post-intervention.
The Reason for the Rapid Rebound
Experts believe the way of the injections accounts for the heightened regain.
GLP-1 drugs imitate a natural hormone called glucagon-like peptide-1, which moderates appetite.
"Artificially providing GLP-1 concentrations several times higher than the body's typical production might result in the system to produce less of its own natural GLP-1, and may also reduce responsiveness to its effects," said Dr. Adam Collins, a nutrition researcher.
"Withdrawal of this hormone supplement leads to hunger is no longer kept in check, making excessive eating much more probable."
A Chronic Condition?
The NHS advise the injections for individuals with weight-linked health risks, accompanied by recommended lifestyle changes.
A number of clinicians contend that, considering the significant potential of weight regain, the therapy should be considered long-term.
This perspective is reinforced by drug manufacturers, who say that the findings "underscore the persistent character of excess weight," comparing it to managing diseases like hypertension.
Patient Experiences
People who have come off the medication explain a powerful resurgence of cravings.
"It felt as if a trigger that goes on and I was suddenly ravenous," recalled one woman.
This challenge is exacerbated if users have not developed permanent dietary or behavioural modifications during treatment.
Growing Use
Survey data indicate that a significant number of adults in the UK have used these injections in the last 12 months, with demand remaining high.
- Use is greater among females compared to men.
- The middle-aged age group shows the greatest usage rates.
- A large proportion obtain the drugs through private prescriptions rather than the NHS.
Finally, clinicians emphasize that while these medications are effective tools for weight loss, they are not a magic solution and long-term success relies on integrated behavioural changes.
