Fresh analysis suggests that patients who come off new weight-loss injections like semaglutide or tirzepatide can put back on reduced body mass far faster than those who end conventional lifestyle plans.
Published data in a major health publication points out that while obese individuals often shed a large proportion of their total mass while on the medication, the weight is regained at an estimated rate of nearly a kilo each month upon discontinuation.
"Users purchasing such medications should be informed of the risk of fast rebound weight gain when the treatment is stopped," stated expert Dr. Susan Jebb.
Such speed of regain implies a reversion to starting weight within about a year and a half.
Comparing Therapies
The study, which examined dozens of trials involving over 9,000 of participants, compared the results of the injectable medications with conventional dieting.
The team point out that people who shed pounds through diet and exercise typically have a slower creep back—around 100 grams monthly—post-intervention.
The Reason for the Fast Regain
Experts suggest the mechanism of the injections is key to understanding the amplified weight return.
The injections imitate a body's own chemical called GLP-1, which controls appetite.
"Artificially providing GLP-1 levels several times higher than normal could lead to the system to generate a reduced amount of its endogenous GLP-1, and may also lessen responsiveness to its actions," noted Dr. Adam Collins, a dietetics specialist.
"Withdrawal of this medication leads to appetite is no longer kept in check, making binge eating a significant risk."
An Ongoing Issue?
Health authorities recommend the jabs for individuals with obesity-related health risks, accompanied by prescribed diet and exercise modifications.
Many experts argue that, considering the high risk of weight regain, the treatment should be considered long-term.
This view is supported by pharmaceutical companies, who say that the findings "emphasize the chronic nature of excess weight," comparing it to managing diseases like high blood pressure.
User Testimonies
Individuals who have stopped the medication report a powerful return of cravings.
"It was like something flipping and I was suddenly ravenous," described one woman.
The struggle is compounded if users have not adopted sustainable dietary or behavioural modifications during treatment.
Significant Use
Survey data suggest that millions of adults in the UK have used weight-loss jabs in the last 12 months, with demand being substantial.
- Use is more common among women compared to males.
- The 40s and 50s age group shows the highest level of interest.
- Many access the drugs through private prescriptions rather than the NHS.
Ultimately, researchers caution that while the jabs are effective agents for shedding pounds, they are not a standalone solution and lasting health benefits hinges on integrated behavioural support.
