A recent study reveals that patients who come off blockbuster slimming jabs like semaglutide or tirzepatide can put back on shed pounds far faster than those who end conventional diet and exercise programs.
Published data in a major health publication points out that while overweight individuals often shed about a fifth of their total mass while on the medication, the weight comes back at an average rate of nearly a kilo each month upon discontinuation.
"People purchasing such drugs should be informed of the risk of fast weight regain when the medication is stopped," cautioned expert Dr. Susan Jebb.
Such speed of regain implies a reversion to starting weight in about 18 months.
The study, which examined 37 of trials involving thousands of patients, compared the outcomes of GLP-1 agonists with conventional dieting.
The team note that people who lose weight through lifestyle changes alone usually experience a slower creep back—perhaps 100 grams monthly—after stopping.
Nutrition scientists believe the mechanism of the injections explains the amplified regain.
These medications mimic a body's own chemical called glucagon-like peptide-1, which moderates hunger.
"Artificially providing the hormone levels several times higher than normal might result in the system to produce less of its own natural GLP-1, and may also reduce sensitivity to its actions," said Dr. Adam Collins, a dietetics specialist.
"Discontinuation of this GLP-1 'fix' results in hunger is unsuppressed, making excessive eating much more probable."
The NHS suggest the injections for individuals with obesity-related health risks, alongside prescribed lifestyle changes.
A number of clinicians contend that, considering the significant potential of weight regain, the treatment might need to be long-term.
This perspective is reinforced by drug manufacturers, who note that the results "emphasize the long-term nature of excess weight," similar to managing diseases like high blood pressure.
Individuals who have stopped the jabs explain a powerful return of hunger.
"It was like something activating and I was suddenly extremely hungry," recalled a patient.
This difficulty is exacerbated if users have not adopted lasting dietary or behavioural modifications during therapy.
Figures indicate that a significant number of adults in the UK have tried weight-loss jabs in the past year, with desire continuing to grow.
In conclusion, experts stress that while the jabs are potent tools for shedding pounds, they are not a permanent fix and lasting health benefits likely depends on ongoing behavioural support.
Elara Vance is a digital strategist with over a decade of experience in tech consulting, specializing in helping UK businesses navigate digital transformation and IT innovation.