Fresh analysis suggests that individuals who come off new weight-loss injections like semaglutide or tirzepatide may regain lost weight much more quickly than those who halt conventional diet and exercise plans.
Findings released in a prominent medical journal demonstrates that while overweight individuals can lose about a fifth of their body weight while undergoing treatment, the mass comes back at an average rate of nearly a kilo each month after stopping.
"Individuals buying these medications need to be cognizant of the danger of fast rebound weight gain when the therapy concludes," stated researcher Dr. Susan Jebb.
This pace of regain means a return to starting weight in about one and a half years.
Comparing Treatments
The study, which looked at 37 of trials involving over 9,000 of participants, compared the effects of these new drugs with conventional dieting.
Scientists emphasize that individuals who lose weight through diet and exercise usually experience a less rapid creep back—around 0.1 kg a month—post-intervention.
Understanding the Fast Regain
Doctors believe the mode of action of the drugs explains the amplified rebound.
GLP-1 drugs mimic a body's own chemical called GLP-1, which helps regulate appetite.
"Artificially providing GLP-1 concentrations several times higher than normal might result in the body to produce less of its own natural GLP-1, and may also lessen sensitivity to its effects," explained Dr. Adam Collins, a nutrition specialist.
"Stopping of this hormone supplement leads to hunger is uncontrolled, making overeating a significant risk."
A Chronic Issue?
The NHS recommend the injections for individuals with obesity-related medical conditions, alongside recommended diet and exercise modifications.
A number of clinicians say that, given the likelihood of weight regain, the therapy should be considered ongoing.
This view is reinforced by drug manufacturers, who say that the results "underscore the persistent character of excess weight," comparing it to managing conditions like high blood pressure.
User Accounts
People who have come off the jabs explain a powerful return of hunger.
"I experienced a switch flipping and I was suddenly starving," said a patient.
The struggle is exacerbated if users have not established lasting dietary or behavioural modifications during therapy.
Widespread Use
Recent estimates indicate that millions of people in the UK have tried these injections in the past year, with interest being substantial.
- Adoption is more common among females compared to males.
- The 40s and 50s age group shows the greatest usage rates.
- Many access the drugs through private healthcare rather than the NHS.
Ultimately, clinicians emphasize that while these medications are powerful agents for weight loss, they are not a magic fix and long-term success likely depends on combined lifestyle changes.
