New research suggests that patients who discontinue popular slimming jabs like semaglutide or tirzepatide tend to recover shed pounds at a significantly accelerated pace than those who end traditional lifestyle regimens.
Findings released in a major medical journal shows that while overweight individuals often shed substantial amounts of their total mass while undergoing treatment, the weight comes back at an estimated rate of 0.8 kg per month once they quit.
"Individuals using these drugs need to be aware of the risk of fast rebound weight gain when the medication concludes," cautioned lead investigator Dr. Susan Jebb.
That rate of regain means a return to original weight in about 18 months.
Weighing Therapies
The research, which examined 37 of trials involving thousands of patients, contrasted the outcomes of GLP-1 agonists with conventional dieting.
The team note that individuals who shed pounds through lifestyle changes alone generally have a more gradual weight regain—approximately 100 grams monthly—post-intervention.
Explaining the Fast Regain
Doctors propose the way of the jabs explains the heightened weight return.
These medications mimic a natural hormone called GLP-1, which moderates feelings of fullness.
"Artificially providing GLP-1 concentrations far above than normal could lead to the system to produce less of its own natural GLP-1, and may also diminish sensitivity to its actions," noted Dr. Adam Collins, a nutrition specialist.
"Discontinuation of this GLP-1 'fix' leads to appetite is no longer kept in check, making binge eating a significant risk."
A Chronic Issue?
Health authorities recommend the injections for people with weight-linked health risks, alongside recommended lifestyle changes.
Many experts contend that, due to the high risk of relapse, 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 obesity," similar to managing diseases like hypertension.
Patient Experiences
Users who have discontinued the medication explain a sudden return of appetite.
"I experienced a switch flipping and I was suddenly ravenous," recalled one woman.
This difficulty is exacerbated if patients have not developed sustainable lifestyle or habit changes during treatment.
Growing Adoption
Figures show that a significant number of adults in the UK have used weight-loss jabs in the past year, with interest continuing to grow.
- Adoption is greater among women than men.
- The 40s and 50s demographic shows the greatest usage rates.
- Many access the drugs through private healthcare rather than the NHS.
Finally, clinicians caution that while these medications are potent tools for weight loss, they are not a permanent fix and maintained weight loss relies on ongoing lifestyle support.
