Fresh analysis suggests that patients who discontinue new weight-loss injections like Wegovy and Mounjaro may regain reduced body mass at a significantly accelerated pace than those who stop conventional diet and exercise programs.
Research printed in a prominent medical journal points out that while obese people frequently drop about a fifth of their total mass while using the jabs, the mass is regained at an average rate of 0.8 kg per month once they quit.
"People using these drugs must be cognizant of the risk of rapid rebound weight gain when the medication ends," cautioned lead investigator Dr. Susan Jebb.
Such speed of recovery implies a reversion to pre-treatment mass within about one and a half years.
Comparing Approaches
The analysis, which reviewed dozens of trials involving over 9,000 of patients, contrasted the effects of these new drugs with conventional dieting.
The team emphasize that people who lose weight through dieting typically experience a less rapid creep back—approximately 100 grams monthly—after stopping.
Explaining the Fast Regain
Nutrition scientists propose the mechanism of the drugs is key to understanding the amplified weight return.
GLP-1 drugs copy a body's own chemical called glucagon-like peptide-1, which helps regulate hunger.
"Sustained high doses of GLP-1 concentrations far above than normal might result in the body to produce less of its own natural GLP-1, and could lessen responsiveness to its effects," said Dr. Adam Collins, a dietetics specialist.
"Stopping of this GLP-1 'fix' leads to hunger is no longer kept in check, making overeating far more likely."
A Chronic Issue?
Health authorities suggest the injections for individuals with obesity-related health risks, accompanied by prescribed lifestyle changes.
Many experts say that, considering the significant potential of weight regain, the therapy should be considered ongoing.
This perspective is echoed by pharmaceutical companies, who say that the findings "underscore the long-term nature of obesity," similar to managing diseases like high blood pressure.
Patient Testimonies
Individuals who have stopped the medication report a intense resurgence of hunger.
"I experienced a switch flipping and I was suddenly ravenous," described one woman.
This challenge is exacerbated if users have not adopted permanent dietary or behavioural modifications during therapy.
Growing Use
Figures indicate that millions of adults in the UK have tried weight-loss jabs in the past year, with interest being substantial.
- Adoption is greater among women than males.
- The 40s and 50s demographic shows the greatest usage rates.
- A large proportion access the medications through private healthcare rather than the NHS.
Finally, experts caution that while the jabs are potent agents for shedding pounds, they are not a standalone fix and long-term success relies on combined behavioural changes.
