A recent study indicates that people who come off new weight-loss injections like semaglutide or tirzepatide tend to recover reduced body mass at a significantly accelerated pace than those who halt conventional lifestyle programs.
Findings released in a prominent health publication demonstrates that while overweight people frequently drop a large proportion of their body weight while using the jabs, the mass returns at an estimated rate of nearly a kilo each month upon discontinuation.
"Users purchasing these treatments must be informed of the risk of fast rebound weight gain when the therapy ends," warns lead investigator Dr. Susan Jebb.
This pace of regain means a return to original weight within about a year and a half.
Comparing Approaches
The research, which looked at 37 of studies involving thousands of participants, compared the outcomes of these new drugs with conventional dieting.
Researchers emphasize that people who lose weight through dieting usually see a more gradual weight regain—perhaps 0.1 kg a month—after stopping.
Explaining the Fast Rebound
Nutrition scientists propose the mechanism of the drugs accounts for the heightened weight return.
These medications imitate a natural hormone called glucagon-like peptide-1, which moderates hunger.
"Sustained high doses of the hormone concentrations several times higher than the body's typical production may cause the body to generate a reduced amount of its own natural hormone, and could diminish sensitivity to its actions," said Dr. Adam Collins, a dietetics expert.
"Discontinuation of this hormone supplement results in appetite is uncontrolled, making overeating much more probable."
A Lifelong Condition?
The NHS suggest the injections for individuals with obesity-related health risks, accompanied by recommended lifestyle changes.
Professionals contend that, given the high risk of weight regain, the therapy should be considered ongoing.
This perspective is echoed by drug manufacturers, who note that the results "emphasize the long-term nature of excess weight," comparing it to managing diseases like hypertension.
Patient Experiences
People who have stopped the jabs explain a powerful return of cravings.
"It felt as if something flipping and you're instantly ravenous," described an individual.
This challenge is worsened if patients have not adopted lasting dietary or behavioural modifications during treatment.
Widespread Interest
Figures show that millions of adults in the UK have tried weight-loss jabs in the past year, with desire continuing to grow.
- Use is higher among women compared to men.
- The 40s and 50s age group shows the highest usage rates.
- Many access the medications through private healthcare rather than the NHS.
Ultimately, clinicians stress that while these medications are powerful tools for weight loss, they are not a standalone fix and maintained weight loss relies on combined behavioural support.
