New research suggests that individuals who come off blockbuster slimming jabs like Mounjaro or Wegovy may regain lost weight far faster than those who end traditional lifestyle regimens.
Published data in a major medical journal shows that while overweight people often shed a large proportion of their body weight while using the jabs, the mass returns at an estimated rate of nearly a kilo each month upon discontinuation.
"Individuals buying such medications should be cognizant of the danger of quick weight regain when the treatment concludes," cautioned expert Dr. Susan Jebb.
This pace of regain means a return to pre-treatment mass in about one and a half years.
Comparing Treatments
The study, which looked at 37 of studies involving thousands of patients, contrasted the outcomes of GLP-1 agonists with conventional dieting.
Scientists emphasize that people who lose weight through lifestyle changes alone generally experience a more gradual weight regain—around 0.1 kg a month—post-intervention.
Understanding the Rapid Rebound
Nutrition scientists suggest the mechanism of the drugs explains the amplified regain.
GLP-1 drugs imitate a body's own chemical called glucagon-like peptide-1, which moderates appetite.
"Sustained high doses of the hormone concentrations several times higher than normal could lead to the body to generate a reduced amount of its own natural hormone, and could diminish sensitivity to its actions," noted Dr. Adam Collins, a nutrition specialist.
"Discontinuation of this hormone supplement means hunger is no longer kept in check, making overeating a significant risk."
A Lifelong Issue?
Medical guidelines advise the jabs for people with obesity-related health risks, accompanied by recommended lifestyle changes.
Many experts argue that, given the likelihood of relapse, the therapy should be considered ongoing.
This perspective is supported by pharmaceutical companies, who state that the findings "highlight the long-term nature of excess weight," similar to managing diseases like diabetes.
User Experiences
Users who have discontinued the jabs describe a sudden resurgence of appetite.
"It felt as if something flipping and you're instantly ravenous," said an individual.
The struggle is worsened if patients have not adopted lasting dietary or behavioural changes during treatment.
Widespread Interest
Survey data show that millions of adults in the UK have used these injections in the last 12 months, with interest remaining high.
- Use is greater among females than men.
- The 40s and 50s demographic shows the highest level of interest.
- Many obtain the drugs through private healthcare rather than the NHS.
Ultimately, experts caution that while these medications are effective agents for weight loss, they are not a permanent fix and lasting health benefits hinges on integrated behavioural management.