Fresh analysis suggests that patients who come off blockbuster weight-loss injections like semaglutide or tirzepatide can put back on lost weight much more quickly than those who halt conventional diet and exercise programs.
Published data in a leading medical journal shows that while obese people frequently drop a large proportion of their total mass while undergoing treatment, the mass comes back at an estimated rate of nearly a kilo each month after stopping.
"People purchasing these drugs should be cognizant of the potential of fast rebound weight gain when the medication ends," warns lead investigator Dr. Susan Jebb.
That rate of recovery implies a reversion to pre-treatment mass within about one and a half years.
Weighing Therapies
The research, which looked at 37 of studies involving over 9,000 of patients, contrasted the outcomes of these new drugs with conventional dieting.
The team emphasize that people who shed pounds through lifestyle changes alone generally experience a slower creep back—perhaps 0.1 kg a month—after stopping.
The Reason for the Fast Regain
Nutrition scientists believe the mechanism of the injections is key to understanding the heightened weight return.
The injections copy a natural hormone called glucagon-like peptide-1, which controls hunger.
"Long-term administration of GLP-1 concentrations far above than the body's typical production might result in the body to produce less of its endogenous hormone, and may also diminish responsiveness to its effects," explained Dr. Adam Collins, a dietetics researcher.
"Withdrawal of this medication leads to hunger is uncontrolled, making overeating much more probable."
A Lifelong Disease?
Medical guidelines recommend the injections for people with obesity-related medical conditions, alongside recommended diet and exercise modifications.
Many experts argue that, considering the significant potential of weight regain, the therapy might need to be long-term.
This perspective is reinforced by drug manufacturers, who note that the findings "emphasize the long-term nature of obesity," similar to managing conditions like diabetes.
User Testimonies
People who have discontinued the medication describe a sudden resurgence of cravings.
"It felt as if a trigger flipping and you become extremely hungry," said an individual.
The struggle is compounded if patients have not established lasting dietary or behavioural modifications during treatment.
Growing Interest
Recent estimates show that millions of people in the UK have tried weight-loss jabs in the last 12 months, with demand remaining high.
- Adoption is higher among women compared to males.
- The middle-aged demographic shows the greatest level of interest.
- Many access the drugs through private prescriptions rather than the NHS.
Ultimately, experts emphasize that while these medications are powerful agents for shedding pounds, they are not a permanent fix and lasting health benefits hinges on ongoing lifestyle management.
