Fresh analysis suggests that people who come off new weight-loss injections like semaglutide or tirzepatide tend to recover lost weight far faster than those who end conventional lifestyle plans.
Research printed in a major medical journal shows that while obese people frequently drop substantial amounts of their body weight while on the medication, the mass is regained at an average rate of 0.8 kg per month once they quit.
"Users purchasing such treatments should be informed of the risk of fast weight regain when the treatment concludes," stated lead investigator Dr. Susan Jebb.
This pace of regain means a return to pre-treatment mass in about a year and a half.
Comparing Approaches
The study, which looked at 37 of trials involving over 9,000 of patients, compared the results of these new drugs with older methods.
Researchers emphasize that people who shed pounds through diet and exercise generally experience a more gradual creep back—around 100 grams monthly—post-intervention.
Understanding the Fast Rebound
Nutrition scientists suggest the mechanism of the jabs explains the heightened regain.
The injections copy a body's own chemical called GLP-1, which helps regulate hunger.
"Sustained high doses of GLP-1 concentrations several times higher than the body's typical production could lead to the system to generate a reduced amount of its endogenous hormone, and could lessen responsiveness to its effects," noted Dr. Adam Collins, a dietetics expert.
"Withdrawal of this GLP-1 'fix' leads to appetite is unsuppressed, making binge eating a significant risk."
A Lifelong Disease?
Health authorities recommend the jabs for individuals with obesity-related medical conditions, accompanied by recommended diet and exercise modifications.
Professionals argue that, given the likelihood of relapse, the therapy might need to be long-term.
This view is supported by drug manufacturers, who say that the findings "underscore the persistent nature of excess weight," comparing it to managing conditions like hypertension.
User Experiences
People who have stopped the jabs report a sudden resurgence of hunger.
"It felt as if something flipping and you're instantly ravenous," recalled one woman.
This challenge is compounded if patients have not adopted permanent lifestyle or habit modifications during treatment.
Growing Adoption
Survey data indicate that millions of people in the UK have used these injections in the past year, with interest continuing to grow.
- Adoption is more common among females compared to men.
- The 40s and 50s demographic shows the highest level of interest.
- A large proportion obtain the medications through private prescriptions rather than the NHS.
Ultimately, researchers caution that while the jabs are effective tools for weight loss, they are not a magic cure and maintained weight loss likely depends on combined lifestyle changes.
