A recent study suggests that people who discontinue blockbuster GLP-1 drugs like semaglutide or tirzepatide can put back on lost weight much more quickly than those who end traditional diet and exercise plans.
Research printed in a leading medical journal points out that while obese people often shed substantial amounts of their total mass while undergoing treatment, the weight returns at an average rate of 0.8 kg per month once they quit.
"Users buying such treatments should be informed of the risk of fast weight regain when the treatment ends," warns researcher Dr. Susan Jebb.
This pace of recovery means a return to pre-treatment mass within about one and a half years.
Analyzing Approaches
The study, which reviewed dozens of trials involving over 9,000 of participants, compared the effects of GLP-1 agonists with other pills.
Scientists point out that individuals who shed pounds through lifestyle changes alone typically see a more gradual creep back—approximately 0.1 kg a month—once they finish.
Understanding the Fast Regain
Nutrition scientists believe the mode of action of the jabs is key to understanding the accelerated weight return.
These medications imitate a natural hormone called GLP-1, which helps regulate appetite.
"Artificially providing the hormone concentrations several times higher than the body's typical production might result in the body to generate a reduced amount of its own natural GLP-1, and could lessen sensitivity to its effects," said Dr. Adam Collins, a nutrition expert.
"Discontinuation of this hormone supplement leads to hunger is uncontrolled, making excessive eating far more likely."
A Chronic Disease?
The NHS advise the jabs for individuals with weight-linked health risks, accompanied by recommended lifestyle changes.
Many experts contend that, due to the likelihood of weight regain, the treatment might need to be ongoing.
This perspective is echoed by pharmaceutical companies, who state that the findings "emphasize the long-term nature of excess weight," similar to managing conditions like hypertension.
Patient Accounts
Individuals who have discontinued the jabs describe a intense resurgence of cravings.
"It felt as if a switch flipping and you're instantly extremely hungry," described an individual.
The struggle is compounded if individuals have not adopted permanent lifestyle or habit modifications during therapy.
Widespread Interest
Survey data suggest that a significant number of adults in the UK have tried weight-loss jabs in the past year, with demand continuing to grow.
- Use is higher among women compared to men.
- The middle-aged age group shows the highest usage rates.
- A large proportion access the drugs through private healthcare rather than the NHS.
Ultimately, clinicians caution that while these medications are powerful tools for weight loss, they are not a permanent fix and lasting health benefits hinges on combined behavioural support.
