New research suggests that individuals who discontinue blockbuster GLP-1 drugs like semaglutide or tirzepatide can put back on reduced body mass much more quickly than those who stop traditional diet and exercise plans.
Research printed in a leading medical journal shows that while overweight individuals can lose about a fifth of their total mass while on the medication, the weight returns at an average rate of nearly a kilo each month after stopping.
"People buying such medications must be informed of the potential of fast weight regain when the medication is stopped," warns researcher Dr. Susan Jebb.
That rate of regain implies a reversion to original weight in about one and a half years.
Comparing Treatments
The research, which reviewed dozens of trials involving over 9,000 of participants, compared the outcomes of the injectable medications with conventional dieting.
The team emphasize that people who lose weight through diet and exercise usually see a slower creep back—perhaps 0.1 kg a month—post-intervention.
Understanding the Rapid Regain
Nutrition scientists believe the mode of action of the injections explains the accelerated weight return.
These medications mimic a natural hormone called GLP-1, which moderates appetite.
"Sustained high doses of GLP-1 levels several times higher than normal could lead to the system to produce less of its own natural hormone, and may also lessen sensitivity to its effects," explained Dr. Adam Collins, a dietetics researcher.
"Withdrawal of this GLP-1 'fix' means appetite is uncontrolled, making excessive eating much more probable."
An Ongoing Issue?
Medical guidelines suggest the jabs for people with obesity-related medical conditions, alongside prescribed lifestyle changes.
A number of clinicians argue that, due to the high risk of relapse, the therapy might need to be long-term.
This perspective is echoed by pharmaceutical companies, who note that the results "emphasize the chronic character of obesity," akin to managing diseases like hypertension.
Patient Experiences
Individuals who have stopped the jabs report a sudden resurgence of cravings.
"I experienced a trigger that goes on and you're instantly starving," said one woman.
This difficulty is worsened if users have not developed permanent lifestyle or habit modifications during treatment.
Significant Interest
Recent estimates suggest that a significant number of people in the UK have used these injections in the past year, with desire remaining high.
- Adoption is higher among women compared to males.
- The 40s and 50s age group shows the greatest level of interest.
- A large proportion access the medications through private prescriptions rather than the NHS.
In conclusion, researchers caution that while these medications are powerful agents for weight loss, they are not a magic solution and maintained weight loss hinges on combined lifestyle support.
