Fresh analysis reveals that people who discontinue popular weight-loss injections like semaglutide or tirzepatide may regain lost weight at a significantly accelerated pace than those who stop traditional diet and exercise plans.
Published data in a prominent medical journal points out that while overweight individuals frequently drop about a fifth of their total mass while on the medication, the mass returns at an estimated rate of nearly a kilo each month once they quit.
"Individuals buying these medications should be cognizant of the danger of rapid rebound weight gain when the medication ends," warns lead investigator Dr. Susan Jebb.
Such speed of regain suggests a return to pre-treatment mass in about 18 months.
Weighing Approaches
The research, which reviewed dozens of studies involving thousands of patients, compared the effects of GLP-1 agonists with older methods.
The team note that individuals who shed pounds through dieting usually see a slower weight regain—perhaps 0.1 kg a month—post-intervention.
Understanding the Rapid Rebound
Nutrition scientists propose the mode of action of the injections is key to understanding the heightened weight return.
GLP-1 drugs imitate a body's own chemical called glucagon-like peptide-1, which moderates feelings of fullness.
"Sustained high doses of GLP-1 levels far above than normal might result in the body to generate a reduced amount of its endogenous hormone, and could diminish sensitivity to its effects," said Dr. Adam Collins, a nutrition specialist.
"Stopping of this GLP-1 'fix' leads to appetite is unsuppressed, making overeating much more probable."
A Chronic Disease?
Medical guidelines recommend the injections for people with weight-linked health risks, alongside recommended lifestyle changes.
A number of clinicians argue that, due to the likelihood of relapse, the therapy might need to be life-long.
This view is supported by pharmaceutical companies, who note that the results "emphasize the long-term character of excess weight," similar to managing conditions like high blood pressure.
User Experiences
People who have discontinued the jabs report a sudden resurgence of hunger.
"It was like a trigger flipping and you become ravenous," recalled an individual.
The struggle is compounded if individuals have not adopted permanent dietary or behavioural changes during therapy.
Growing Interest
Survey data suggest that a significant number of adults in the UK have tried weight-loss jabs in the last 12 months, with interest being substantial.
- Use is higher among women compared to men.
- The 40s and 50s demographic shows the greatest level of interest.
- Many access the medications through private prescriptions rather than public health services.
Finally, experts caution that while the jabs are effective agents for shedding pounds, they are not a magic fix and maintained weight loss relies on integrated behavioural support.
