Fresh analysis reveals that people who stop using new GLP-1 drugs like semaglutide or tirzepatide may regain shed pounds at a significantly accelerated pace than those who end traditional diet and exercise programs.
Findings released in a leading health publication points out that while obese people often shed about a fifth of their body weight while undergoing treatment, the mass comes back at an estimated rate of 0.8 kg per month after stopping.
"People buying such medications must be informed of the potential of fast rebound weight gain when the treatment ends," warns lead investigator Dr. Susan Jebb.
That rate of recovery suggests a reversion to pre-treatment mass in about 18 months.
Weighing Therapies
The analysis, which examined 37 of studies involving thousands of patients, compared the results of GLP-1 agonists with conventional dieting.
The team note that people who shed pounds through lifestyle changes alone generally see a more gradual weight regain—around 100 grams monthly—once they finish.
The Reason for the Rapid Regain
Experts suggest the mechanism of the drugs is key to understanding the amplified rebound.
The injections mimic a body's own chemical called glucagon-like peptide-1, which controls hunger.
"Artificially providing GLP-1 concentrations several times higher than the body's typical production could lead to the system to produce less of its own natural GLP-1, and could reduce sensitivity to its actions," explained Dr. Adam Collins, a nutrition researcher.
"Stopping of this GLP-1 'fix' means hunger is no longer kept in check, making excessive eating far more likely."
A Chronic Issue?
The NHS suggest the injections for people with obesity-related health risks, alongside recommended lifestyle changes.
Many experts contend that, considering the high risk of weight regain, the treatment is often life-long.
This view is reinforced by drug manufacturers, who note that the findings "underscore the long-term character of obesity," akin to managing diseases like high blood pressure.
Patient Testimonies
Individuals who have come off the medication report a intense return of hunger.
"It felt as if a switch flipping and you become extremely hungry," said an individual.
This difficulty is exacerbated if individuals have not developed permanent lifestyle or habit modifications during therapy.
Significant Adoption
Survey data suggest that millions of adults in the UK have used these injections in the past year, with demand remaining high.
- Use is higher among women than men.
- The middle-aged demographic shows the highest usage rates.
- A large proportion access the drugs through private healthcare rather than the NHS.
Ultimately, experts emphasize that while these medications are powerful agents for shedding pounds, they are not a magic fix and maintained weight loss hinges on combined lifestyle support.
