Fresh analysis suggests that people who discontinue new weight-loss injections like semaglutide or tirzepatide can put back on reduced body mass far faster than those who halt conventional lifestyle regimens.
Findings released in a leading health publication shows that while obese people often shed substantial amounts of their body weight while using the jabs, the weight is regained at an estimated rate of nearly a kilo each month once they quit.
"Individuals using these treatments should be informed of the risk of fast rebound weight gain when the treatment concludes," stated researcher Dr. Susan Jebb.
Such speed of regain means a return to starting mass within about a year and a half.
Weighing Treatments
The analysis, which looked at dozens of trials involving over 9,000 of patients, contrasted the effects of GLP-1 agonists with conventional dieting.
The team emphasize that people who shed pounds through dieting typically have a less rapid weight regain—around 0.1 kg a month—post-intervention.
Explaining the Rapid Regain
Doctors suggest the mechanism of the drugs is key to understanding the heightened rebound.
The injections copy a body's own chemical called glucagon-like peptide-1, which helps regulate appetite.
"Long-term administration of GLP-1 concentrations several times higher than normal could lead to the system to produce less of its own natural hormone, and may also reduce sensitivity to its actions," said Dr. Adam Collins, a nutrition researcher.
"Discontinuation of this GLP-1 'fix' leads to hunger is uncontrolled, making binge eating far more likely."
A Lifelong Condition?
The NHS suggest the injections for people with weight-linked medical conditions, alongside recommended diet and exercise modifications.
Professionals argue that, considering the high risk of relapse, the treatment might need to be ongoing.
This view is reinforced by drug manufacturers, who note that the findings "highlight the long-term nature of excess weight," similar to managing conditions like high blood pressure.
Patient Testimonies
People who have discontinued the jabs explain a powerful return of appetite.
"It was like a switch activating and you're instantly ravenous," described a patient.
This difficulty is compounded if individuals have not established sustainable dietary or behavioural changes during treatment.
Widespread Adoption
Survey data show that millions of adults in the UK have tried weight-loss jabs in the past year, with demand being substantial.
- Adoption is higher among women than males.
- The middle-aged age group shows the greatest usage rates.
- A large proportion obtain the medications through private healthcare rather than public health services.
Finally, researchers stress that while these medications are effective agents for shedding pounds, they are not a standalone fix and maintained weight loss likely depends on ongoing lifestyle support.
