New research suggests that patients who come off popular GLP-1 drugs like semaglutide or tirzepatide may regain lost weight at a significantly accelerated pace than those who end traditional lifestyle plans.
Findings released in a prominent health publication points out that while obese people often shed a large proportion of their body weight while undergoing treatment, the mass is regained at an estimated rate of 0.8 kg per month after stopping.
"People buying such medications must be aware of the danger of rapid rebound weight gain when the treatment is stopped," warns researcher Dr. Susan Jebb.
Such speed of recovery implies a return to starting weight within about one and a half years.
Comparing Approaches
The research, which reviewed 37 of studies involving over 9,000 of patients, contrasted the effects of the injectable medications with other pills.
The team emphasize that people who shed pounds through dieting typically see a more gradual creep back—approximately 100 grams monthly—once they finish.
The Reason for the Quick Regain
Doctors believe the mode of action of the injections accounts for the heightened regain.
These medications imitate a body's own chemical called glucagon-like peptide-1, which moderates feelings of fullness.
"Long-term administration of GLP-1 levels far above than the body's typical production could lead to the body to generate a reduced amount of its own natural hormone, and may also lessen sensitivity to its actions," said Dr. Adam Collins, a nutrition specialist.
"Discontinuation of this medication results in hunger is unsuppressed, making overeating much more probable."
A Lifelong Disease?
The NHS advise the injections for individuals with obesity-related health risks, accompanied by prescribed diet and exercise modifications.
A number of clinicians argue that, given the likelihood of weight regain, the therapy might need to be ongoing.
This view is supported by pharmaceutical companies, who state that the results "underscore the chronic nature of obesity," comparing it to managing conditions like high blood pressure.
User Experiences
Individuals who have come off the medication report a powerful resurgence of hunger.
"It was like something activating and you become ravenous," said one woman.
The struggle is compounded if users have not adopted sustainable dietary or behavioural modifications during treatment.
Widespread Use
Recent estimates suggest that millions of people in the UK have tried weight-loss jabs in the past year, with interest remaining high.
- Adoption is greater among women than men.
- The 40s and 50s age group shows the greatest usage rates.
- Many access the drugs through private prescriptions rather than the NHS.
Finally, experts emphasize that while these medications are powerful agents for shedding pounds, they are not a standalone cure and maintained weight loss relies on integrated lifestyle changes.
