A recent study reveals that patients who stop using new weight-loss injections like semaglutide or tirzepatide tend to recover shed pounds much more quickly than those who halt traditional lifestyle plans.
Research printed in a major medical journal points out that while obese individuals often shed a large proportion of their total mass while undergoing treatment, the weight returns at an average rate of 0.8 kg per month once they quit.
"People using these medications must be informed of the danger of fast weight regain when the medication ends," cautioned researcher Dr. Susan Jebb.
This pace of regain implies a reversion to original mass within about one and a half years.
Comparing Therapies
The study, which reviewed dozens of trials involving thousands of patients, contrasted the effects of GLP-1 agonists with conventional dieting.
Scientists point out that people who shed pounds through lifestyle changes alone generally see a slower weight regain—approximately 0.1 kg a month—once they finish.
Explaining the Fast Regain
Experts suggest the mechanism of the jabs is key to understanding the accelerated regain.
GLP-1 drugs mimic a body's own chemical called GLP-1, which moderates hunger.
"Sustained high doses of the hormone levels far above than normal might result in the system to produce less of its endogenous GLP-1, and could diminish sensitivity to its effects," said Dr. Adam Collins, a dietetics researcher.
"Withdrawal of this GLP-1 'fix' means hunger is unsuppressed, making binge eating a significant risk."
A Lifelong Disease?
The NHS advise the injections for individuals with weight-linked medical conditions, accompanied by recommended lifestyle changes.
Professionals say that, given the likelihood of relapse, the treatment is often life-long.
This opinion is supported by drug manufacturers, who note that the findings "underscore the persistent nature of obesity," similar to managing diseases like high blood pressure.
Patient Accounts
Users who have stopped the medication describe a sudden return of appetite.
"I experienced a trigger that goes on and I was suddenly starving," described one woman.
This challenge is compounded if individuals have not established lasting dietary or behavioural modifications during treatment.
Significant Adoption
Survey data indicate that millions of people in the UK have tried these injections in the last 12 months, with desire being substantial.
- Adoption is higher among females compared to males.
- The 40s and 50s demographic shows the greatest usage rates.
- Many obtain the medications through private prescriptions rather than the NHS.
Ultimately, clinicians stress that while these medications are powerful agents for weight loss, they are not a standalone fix and lasting health benefits relies on combined lifestyle changes.
