Fresh analysis suggests that people who stop using blockbuster slimming jabs like semaglutide or tirzepatide tend to recover shed pounds at a significantly accelerated pace than those who halt conventional lifestyle regimens.
Research printed in a leading health publication demonstrates that while obese individuals frequently drop substantial amounts of their body weight while on the medication, the weight is regained at an average rate of nearly a kilo each month after stopping.
"People using these drugs need to be informed of the potential of quick rebound weight gain when the medication is stopped," warns lead investigator Dr. Susan Jebb.
That rate of regain implies a return to original weight in about 18 months.
Weighing Approaches
The study, which examined 37 of trials involving over 9,000 of participants, compared the outcomes of the injectable medications with older methods.
The team note that people who shed pounds through diet and exercise typically experience a less rapid creep back—around 100 grams monthly—after stopping.
Understanding the Rapid Rebound
Experts believe the mechanism of the jabs is key to understanding the accelerated regain.
The injections mimic a body's own chemical called GLP-1, which moderates appetite.
"Artificially providing GLP-1 concentrations several times higher than normal may cause the system to generate a reduced amount of its endogenous GLP-1, and may also reduce sensitivity to its effects," explained Dr. Adam Collins, a dietetics specialist.
"Withdrawal of this GLP-1 'fix' results in hunger is no longer kept in check, making overeating far more likely."
A Lifelong Issue?
Health authorities advise the injections for individuals with obesity-related health risks, accompanied by prescribed lifestyle changes.
Professionals contend that, given the high risk of weight regain, the treatment might need to be life-long.
This view is reinforced by pharmaceutical companies, who say that the results "highlight the long-term nature of excess weight," comparing it to managing conditions like diabetes.
Patient Accounts
Individuals who have discontinued the medication describe a sudden return of cravings.
"It felt as if a switch activating and I was suddenly ravenous," recalled one woman.
This challenge is exacerbated if users have not adopted lasting lifestyle or habit modifications during therapy.
Significant Interest
Survey data indicate that a significant number of people in the UK have tried weight-loss jabs in the last 12 months, with demand remaining high.
- Use is higher among females than males.
- The 40s and 50s age group shows the highest usage rates.
- Many obtain the drugs through private prescriptions rather than the NHS.
Ultimately, clinicians caution that while these medications are powerful tools for shedding pounds, they are not a permanent fix and lasting health benefits relies on combined behavioural management.
