New research reveals that patients who come off popular GLP-1 drugs like semaglutide or tirzepatide can put back on lost weight far faster than those who stop conventional lifestyle regimens.
Findings released in a prominent health publication shows that while obese people often shed a large proportion of their total mass while using the jabs, the mass is regained at an estimated rate of nearly a kilo each month upon discontinuation.
"Users buying such drugs must be cognizant of the potential of fast weight regain when the medication is stopped," warns expert Dr. Susan Jebb.
Such speed of regain suggests a return to pre-treatment mass within about 18 months.
Weighing Approaches
The research, which reviewed dozens of trials involving over 9,000 of participants, compared the effects of the injectable medications with other pills.
Scientists point out that people who shed pounds through dieting typically experience a slower creep back—around 0.1 kg a month—once they finish.
The Reason for the Fast Regain
Nutrition scientists believe the mode of action of the drugs explains the amplified rebound.
The injections copy a body's own chemical called glucagon-like peptide-1, which moderates appetite.
"Artificially providing the hormone levels several times higher than normal might result in the body to generate a reduced amount of its own natural hormone, and may also diminish sensitivity to its actions," noted Dr. Adam Collins, a dietetics researcher.
"Withdrawal of this GLP-1 'fix' leads to hunger is no longer kept in check, making overeating much more probable."
A Chronic Condition?
The NHS advise the injections for individuals with obesity-related medical conditions, alongside recommended lifestyle changes.
Professionals argue that, due to the significant potential of weight regain, the treatment should be considered ongoing.
This opinion is echoed by drug manufacturers, who say that the findings "highlight the chronic nature of obesity," comparing it to managing conditions like hypertension.
Patient Experiences
Users who have come off the jabs explain a sudden return of hunger.
"It was like something flipping and you become ravenous," described a patient.
This difficulty is compounded if patients have not developed permanent dietary or behavioural modifications during therapy.
Growing Adoption
Survey data show that a significant number of adults in the UK have tried weight-loss jabs in the last 12 months, with desire remaining high.
- Use is more common among women than males.
- The 40s and 50s demographic shows the greatest usage rates.
- Many obtain the medications through private healthcare rather than the NHS.
In conclusion, researchers stress that while these medications are potent agents for weight loss, they are not a magic cure and lasting health benefits hinges on integrated behavioural management.
