Fresh analysis indicates that patients who discontinue blockbuster slimming jabs like semaglutide or tirzepatide may regain lost weight at a significantly accelerated pace than those who end traditional lifestyle plans.
Published data in a leading medical journal demonstrates that while obese individuals can lose about a fifth of their body weight while on the medication, the weight is regained at an estimated rate of 0.8 kg per month once they quit.
"Individuals using such drugs must be informed of the danger of rapid rebound weight gain when the treatment ends," stated lead investigator Dr. Susan Jebb.
That rate of regain suggests a reversion to pre-treatment weight in about 18 months.
Comparing Treatments
The analysis, which reviewed dozens of trials involving over 9,000 of participants, compared the outcomes of these new drugs with older methods.
The team emphasize that individuals who lose weight through diet and exercise typically experience a less rapid creep back—approximately 0.1 kg a month—after stopping.
The Reason for the Rapid Regain
Experts propose the mechanism of the jabs explains the amplified regain.
These medications copy a body's own chemical called glucagon-like peptide-1, which helps regulate feelings of fullness.
"Long-term administration of the hormone concentrations far above than normal might result in the system to produce less of its own natural GLP-1, and could diminish sensitivity to its effects," noted Dr. Adam Collins, a nutrition expert.
"Discontinuation of this medication results in appetite is no longer kept in check, making overeating far more likely."
A Lifelong Disease?
Health authorities recommend the injections for people with obesity-related medical conditions, alongside recommended diet and exercise modifications.
Many experts contend that, due to the significant potential of weight regain, the therapy should be considered life-long.
This view is echoed by drug manufacturers, who say that the findings "emphasize the long-term character of obesity," similar to managing diseases like high blood pressure.
User Accounts
Individuals who have discontinued the medication report a intense return of hunger.
"I experienced something that goes on and you become starving," described an individual.
The struggle is worsened if individuals have not adopted sustainable dietary or behavioural modifications during treatment.
Significant Interest
Survey data show that millions of people in the UK have used these injections in the last 12 months, with demand continuing to grow.
- Use is higher among females compared to males.
- The 40s and 50s age group shows the greatest usage rates.
- Many access the drugs through private healthcare rather than the NHS.
Ultimately, experts caution that while these medications are powerful tools for weight loss, they are not a magic cure and lasting health benefits hinges on integrated lifestyle support.
