Fresh analysis reveals that people who come off blockbuster weight-loss injections like semaglutide or tirzepatide tend to recover lost weight much more quickly than those who halt traditional lifestyle programs.
Findings released in a prominent health publication points out that while obese people frequently drop about a fifth of their body weight while on the medication, the weight returns at an average rate of nearly a kilo each month upon discontinuation.
"Users buying these medications need to be aware of the potential of rapid rebound weight gain when the treatment ends," stated expert Dr. Susan Jebb.
That rate of regain suggests a return to starting weight within about a year and a half.
Analyzing Approaches
The research, which examined dozens of trials involving over 9,000 of participants, contrasted the effects of the injectable medications with other pills.
The team note that individuals who lose weight through lifestyle changes alone usually have a less rapid weight regain—perhaps 0.1 kg a month—once they finish.
Understanding the Fast Rebound
Nutrition scientists believe the mechanism of the injections accounts for the accelerated regain.
GLP-1 drugs mimic a natural hormone called GLP-1, which helps regulate feelings of fullness.
"Artificially providing GLP-1 concentrations far above than the body's typical production might result in the system to generate a reduced amount of its endogenous GLP-1, and may also lessen sensitivity to its actions," said Dr. Adam Collins, a dietetics researcher.
"Discontinuation of this medication results in appetite is no longer kept in check, making excessive eating much more probable."
A Lifelong Disease?
The NHS advise the injections for individuals with weight-linked health risks, accompanied by prescribed lifestyle changes.
A number of clinicians contend that, given the likelihood of relapse, the treatment is often ongoing.
This opinion is supported by pharmaceutical companies, who note that the findings "highlight the long-term nature of obesity," akin to managing conditions like hypertension.
Patient Testimonies
Individuals who have come off the medication describe a sudden resurgence of cravings.
"It was like a switch flipping and you become ravenous," recalled one woman.
The struggle is worsened if users have not adopted permanent dietary or behavioural changes during therapy.
Widespread Use
Survey data suggest that a significant number of adults in the UK have used weight-loss jabs in the last 12 months, with demand remaining high.
- Use is more common among women compared to men.
- The 40s and 50s demographic shows the greatest level of interest.
- A large proportion access the drugs through private healthcare rather than public health services.
Ultimately, researchers caution that while these medications are potent agents for weight loss, they are not a magic cure and long-term success hinges on combined lifestyle support.
