Fresh analysis indicates that individuals who come off popular GLP-1 drugs like semaglutide or tirzepatide tend to recover reduced body mass far faster than those who stop traditional diet and exercise regimens.
Published data in a leading health publication shows that while overweight people can lose a large proportion of their body weight while undergoing treatment, the weight is regained at an estimated rate of 0.8 kg per month once they quit.
"Users purchasing such drugs need to be informed of the risk of fast rebound weight gain when the therapy is stopped," cautioned lead investigator Dr. Susan Jebb.
Such speed of regain implies a reversion to starting weight in about 18 months.
Weighing Approaches
The study, which reviewed 37 of trials involving thousands of participants, contrasted the results of the injectable medications with older methods.
The team note that people who shed pounds through lifestyle changes alone usually see a slower creep back—approximately 100 grams monthly—post-intervention.
The Reason for the Rapid Regain
Doctors suggest the mechanism of the jabs is key to understanding the accelerated rebound.
GLP-1 drugs copy a natural hormone called glucagon-like peptide-1, which helps regulate appetite.
"Artificially providing GLP-1 concentrations several times higher than the body's typical production may cause the body to produce less of its own natural GLP-1, and could lessen sensitivity to its actions," explained Dr. Adam Collins, a dietetics expert.
"Discontinuation of this GLP-1 'fix' means hunger is uncontrolled, making binge eating much more probable."
A Lifelong Condition?
The NHS recommend the jabs for individuals with weight-linked health risks, accompanied by prescribed lifestyle changes.
Many experts argue that, due to the high risk of weight regain, the treatment might need to be life-long.
This opinion is reinforced by pharmaceutical companies, who state that the findings "underscore the long-term nature of excess weight," akin to managing diseases like hypertension.
User Experiences
Individuals who have stopped the jabs report a intense resurgence of hunger.
"It felt as if a switch flipping and you become starving," described a patient.
The struggle is exacerbated if individuals have not adopted permanent dietary or behavioural changes during treatment.
Growing Adoption
Survey data suggest that a significant number of people in the UK have used weight-loss jabs in the past year, with demand being substantial.
- Adoption is greater among females than men.
- The 40s and 50s demographic shows the highest usage rates.
- A large proportion obtain the drugs through private prescriptions rather than the NHS.
In conclusion, researchers stress that while these medications are potent tools for shedding pounds, they are not a standalone fix and long-term success likely depends on combined behavioural management.
