Fresh analysis reveals that people who come off blockbuster GLP-1 drugs like semaglutide or tirzepatide tend to recover lost weight at a significantly accelerated pace than those who halt traditional diet and exercise regimens.
Research printed in a major medical journal shows that while overweight individuals can lose substantial amounts of their body weight while undergoing treatment, the mass is regained at an estimated rate of 0.8 kg per month once they quit.
"Individuals purchasing such drugs must be informed of the potential of quick rebound weight gain when the therapy ends," warns researcher Dr. Susan Jebb.
Such speed of regain suggests a return to starting mass in about one and a half years.
Weighing Treatments
The research, which examined 37 of studies involving over 9,000 of participants, compared the effects of the injectable medications with older methods.
The team emphasize that people who shed pounds through dieting usually have a slower weight regain—approximately 0.1 kg a month—after stopping.
Explaining the Quick Rebound
Doctors believe the way of the jabs explains the amplified rebound.
The injections copy a natural hormone called glucagon-like peptide-1, which helps regulate hunger.
"Artificially providing GLP-1 levels several times higher than the body's typical production could lead to the body to generate a reduced amount of its own natural hormone, and could reduce sensitivity to its effects," said Dr. Adam Collins, a nutrition specialist.
"Stopping of this hormone supplement results in appetite is uncontrolled, making binge eating a significant risk."
A Lifelong Condition?
Health authorities recommend the injections for people with obesity-related health risks, alongside prescribed lifestyle changes.
A number of clinicians say that, due to the high risk of relapse, the therapy might need to be ongoing.
This perspective is supported by drug manufacturers, who note that the findings "underscore the long-term character of excess weight," akin to managing conditions like diabetes.
Patient Experiences
People who have come off the medication explain a powerful return of appetite.
"It was like something that goes on and I was suddenly extremely hungry," described one woman.
The struggle is worsened if users have not established permanent dietary or behavioural changes during treatment.
Widespread Interest
Recent estimates indicate that millions of adults in the UK have tried weight-loss jabs in the last 12 months, with interest remaining high.
- Adoption is greater among women compared to men.
- The 40s and 50s demographic shows the greatest level of interest.
- Many obtain the drugs through private prescriptions rather than public health services.
Ultimately, clinicians stress that while these medications are potent tools for weight loss, they are not a permanent fix and maintained weight loss relies on ongoing lifestyle changes.
