New research suggests that patients who come off blockbuster slimming jabs like semaglutide or tirzepatide tend to recover lost weight much more quickly than those who end conventional lifestyle plans.
Published data in a major medical journal shows that while obese people often shed a large proportion of their body weight while using the jabs, the weight returns at an average rate of 0.8 kg per month after stopping.
"Individuals using such treatments should be informed of the danger of rapid rebound weight gain when the medication is stopped," warns researcher Dr. Susan Jebb.
That rate of recovery implies a reversion to original weight in about a year and a half.
Analyzing Approaches
The analysis, which reviewed dozens of trials involving thousands of patients, contrasted the effects of GLP-1 agonists with conventional dieting.
The team emphasize that individuals who lose weight through lifestyle changes alone typically have a more gradual weight regain—around 100 grams monthly—once they finish.
Understanding the Fast Regain
Doctors suggest the mechanism of the injections is key to understanding the amplified regain.
These medications mimic a body's own chemical called glucagon-like peptide-1, which controls appetite.
"Sustained high doses of the hormone concentrations far above than normal might result in the system to produce less of its endogenous GLP-1, and may also reduce responsiveness to its actions," explained Dr. Adam Collins, a dietetics researcher.
"Withdrawal of this GLP-1 'fix' leads to hunger is no longer kept in check, making binge eating far more likely."
A Chronic Disease?
Health authorities suggest the jabs for individuals with obesity-related medical conditions, alongside prescribed diet and exercise modifications.
Many experts say that, due to the likelihood of weight regain, the treatment is often ongoing.
This view is echoed by pharmaceutical companies, who say that the results "emphasize the persistent character of excess weight," akin to managing diseases like high blood pressure.
User Experiences
Users who have come off the medication describe a powerful resurgence of cravings.
"It felt as if something flipping and you become starving," described an individual.
This challenge is exacerbated if users have not adopted permanent lifestyle or habit changes during therapy.
Growing Adoption
Figures indicate that millions of people in the UK have used weight-loss jabs in the past year, with demand being substantial.
- Adoption is higher among females than males.
- The middle-aged demographic shows the greatest usage rates.
- A large proportion access the drugs through private prescriptions rather than the NHS.
Ultimately, clinicians stress that while the jabs are effective tools for weight loss, they are not a magic fix and maintained weight loss likely depends on combined behavioural support.
