Fresh analysis suggests that people who stop using blockbuster slimming jabs like semaglutide or tirzepatide tend to recover reduced body mass much more quickly than those who stop conventional diet and exercise regimens.
Findings released in a prominent medical journal demonstrates that while overweight people can lose a large proportion of their body weight while undergoing treatment, the weight comes back at an average rate of nearly a kilo each month after stopping.
"People purchasing these treatments must be informed of the potential of quick weight regain when the therapy concludes," cautioned lead investigator Dr. Susan Jebb.
Such speed of regain means a return to starting mass in about 18 months.
Analyzing Therapies
The research, which looked at 37 of trials involving thousands of participants, contrasted the results of GLP-1 agonists with older methods.
Scientists point out that people who lose weight through lifestyle changes alone generally have a less rapid weight regain—perhaps 0.1 kg a month—post-intervention.
Explaining the Fast Regain
Nutrition scientists believe the way of the jabs is key to understanding the heightened weight return.
These medications mimic a natural hormone called GLP-1, which moderates feelings of fullness.
"Long-term administration of the hormone concentrations far above than normal may cause the system to generate a reduced amount of its endogenous GLP-1, and may also diminish responsiveness to its effects," said Dr. Adam Collins, a dietetics researcher.
"Discontinuation of this hormone supplement means hunger is unsuppressed, making overeating far more likely."
A Chronic Condition?
The NHS advise the injections for individuals with obesity-related health risks, alongside recommended lifestyle changes.
Many experts argue that, given the high risk of weight regain, the therapy might need to be ongoing.
This perspective is supported by drug manufacturers, who state that the findings "emphasize the persistent character of obesity," similar to managing diseases like high blood pressure.
Patient Experiences
People who have discontinued the medication report a sudden resurgence of appetite.
"It was like a trigger activating and I was suddenly starving," described an individual.
The struggle is worsened if individuals have not established permanent dietary or behavioural changes during treatment.
Growing Adoption
Survey data show that millions of adults in the UK have tried these injections in the last 12 months, with demand remaining high.
- Use is more common among women than males.
- The middle-aged demographic shows the greatest usage rates.
- Many access the medications through private healthcare rather than the NHS.
Finally, experts emphasize that while GLP-1 drugs are powerful tools for weight loss, they are not a magic cure and lasting health benefits relies on ongoing lifestyle support.
