A recent study indicates that individuals who come off blockbuster slimming jabs like semaglutide or tirzepatide tend to recover reduced body mass much more quickly than those who stop conventional diet and exercise programs.
Research printed in a major medical journal shows that while obese people can lose about a fifth of their total mass while on the medication, the mass comes back at an average rate of 0.8 kg per month once they quit.
"People purchasing such medications must be cognizant of the potential of rapid rebound weight gain when the medication is stopped," warns expert Dr. Susan Jebb.
This pace of recovery suggests a reversion to pre-treatment mass in about one and a half years.
Weighing Treatments
The research, which examined 37 of studies involving thousands of patients, contrasted the effects of the injectable medications with conventional dieting.
The team note that people who shed pounds through lifestyle changes alone generally have a more gradual creep back—approximately 0.1 kg a month—post-intervention.
Explaining the Fast Regain
Nutrition scientists propose the mechanism of the injections explains the amplified weight return.
The injections imitate 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 body to produce less of its endogenous GLP-1, and could diminish responsiveness to its actions," said Dr. Adam Collins, a dietetics expert.
"Withdrawal of this GLP-1 'fix' results in appetite is uncontrolled, making excessive eating a significant risk."
A Chronic Condition?
The NHS recommend the injections for individuals with weight-linked health risks, alongside recommended lifestyle changes.
Professionals say that, given the likelihood of relapse, the treatment is often ongoing.
This perspective is reinforced by drug manufacturers, who note that the findings "highlight the chronic nature of obesity," similar to managing conditions like high blood pressure.
Patient Accounts
Users who have come off the medication describe a sudden return of appetite.
"I experienced a trigger flipping and I was suddenly extremely hungry," said one woman.
The struggle is compounded if patients have not developed permanent dietary or behavioural changes during therapy.
Widespread Interest
Survey data suggest that millions of adults in the UK have tried these injections in the last 12 months, with interest continuing to grow.
- Adoption is greater among females compared to males.
- The middle-aged demographic shows the greatest usage rates.
- Many access the medications through private prescriptions rather than public health services.
Ultimately, clinicians stress that while the jabs are effective tools for shedding pounds, they are not a permanent fix and long-term success hinges on combined behavioural management.
