Fresh analysis suggests that people who come off blockbuster GLP-1 drugs like semaglutide or tirzepatide may regain lost weight at a significantly accelerated pace than those who halt conventional diet and exercise programs.
Published data in a prominent health publication demonstrates that while overweight people can lose substantial amounts of their body weight while undergoing treatment, the mass returns at an estimated rate of 0.8 kg per month upon discontinuation.
"Users purchasing such treatments need to be aware of the risk of fast weight regain when the medication ends," warns researcher Dr. Susan Jebb.
That rate of regain suggests a reversion to starting weight within about a year and a half.
Comparing Treatments
The research, which looked at 37 of studies involving thousands of participants, compared the results of these new drugs with older methods.
Researchers note that individuals who shed pounds through lifestyle changes alone typically experience a more gradual weight regain—perhaps 0.1 kg a month—once they finish.
Explaining the Rapid Regain
Doctors propose the mode of action of the injections explains the heightened regain.
These medications imitate a natural hormone called GLP-1, which helps regulate appetite.
"Long-term administration of GLP-1 concentrations several times higher than the body's typical production might result in the system to generate a reduced amount of its endogenous GLP-1, and could diminish responsiveness to its actions," said Dr. Adam Collins, a nutrition researcher.
"Withdrawal of this medication results in hunger is unsuppressed, making binge eating far more likely."
An Ongoing Condition?
Health authorities recommend the jabs for individuals with obesity-related health risks, alongside prescribed lifestyle changes.
Professionals contend that, due to the significant potential of weight regain, the therapy should be considered long-term.
This opinion is echoed by pharmaceutical companies, who say that the results "highlight the long-term nature of excess weight," similar to managing conditions like diabetes.
User Accounts
Individuals who have stopped the jabs explain a intense return of cravings.
"It felt as if a trigger flipping and you're instantly extremely hungry," said one woman.
The struggle is exacerbated if patients have not established sustainable dietary or behavioural modifications during treatment.
Widespread Use
Survey data indicate that a significant number of people in the UK have used these injections in the last 12 months, with interest remaining high.
- Use is more common among women than males.
- The middle-aged demographic shows the highest usage rates.
- A large proportion access the medications through private prescriptions rather than the NHS.
Finally, clinicians stress that while the jabs are potent agents for shedding pounds, they are not a permanent solution and long-term success likely depends on ongoing lifestyle management.
