New research indicates that individuals who stop using blockbuster slimming jabs like semaglutide or tirzepatide may regain lost weight much more quickly than those who stop conventional diet and exercise plans.
Published data in a major medical journal points out that while obese people frequently drop a large proportion of their total mass while on the medication, the mass returns at an estimated rate of 0.8 kg per month upon discontinuation.
"People purchasing these drugs need to be aware of the danger of quick rebound weight gain when the medication is stopped," cautioned lead investigator Dr. Susan Jebb.
Such speed of recovery means a return to original weight within about one and a half years.
Comparing Approaches
The analysis, which reviewed dozens of trials involving thousands of patients, contrasted the outcomes of the injectable medications with older methods.
Researchers note that people who lose weight through lifestyle changes alone usually have a less rapid weight regain—approximately 0.1 kg a month—once they finish.
Explaining the Rapid Regain
Nutrition scientists suggest the mechanism of the injections explains the amplified rebound.
GLP-1 drugs mimic a natural hormone called glucagon-like peptide-1, which helps regulate feelings of fullness.
"Sustained high doses of the hormone levels far above than the body's typical production might result in the system to generate a reduced amount of its endogenous hormone, and may also lessen sensitivity to its actions," noted Dr. Adam Collins, a nutrition specialist.
"Stopping of this GLP-1 'fix' means appetite is uncontrolled, making binge eating far more likely."
A Chronic Issue?
The NHS recommend the injections for people with obesity-related health risks, alongside prescribed diet and exercise modifications.
Many experts say that, due to the high risk of weight regain, the therapy is often long-term.
This view is reinforced by drug manufacturers, who say that the results "underscore the persistent character of obesity," similar to managing diseases like high blood pressure.
Patient Testimonies
People who have come off the jabs describe a intense resurgence of cravings.
"It was like something that goes on and you're instantly ravenous," recalled a patient.
The struggle is compounded if individuals have not established permanent lifestyle or habit modifications during treatment.
Significant Adoption
Recent estimates suggest that millions of people in the UK have used these injections in the last 12 months, with interest remaining high.
- Use is higher among women than males.
- The 40s and 50s demographic shows the highest usage rates.
- Many access the drugs through private prescriptions rather than the NHS.
Finally, clinicians emphasize that while the jabs are potent agents for weight loss, they are not a permanent fix and lasting health benefits hinges on integrated behavioural changes.
