New research indicates that individuals who come off blockbuster GLP-1 drugs like semaglutide or tirzepatide may regain reduced body mass much more quickly than those who stop conventional diet and exercise programs.
Research printed in a major health publication points out that while obese individuals often shed substantial amounts of their body weight while on the medication, the mass is regained at an estimated rate of nearly a kilo each month upon discontinuation.
"Individuals purchasing such treatments should be informed of the risk of fast weight regain when the therapy ends," stated lead investigator Dr. Susan Jebb.
That rate of regain implies a return to pre-treatment weight within about one and a half years.
Analyzing Approaches
The research, which looked at dozens of trials involving over 9,000 of patients, contrasted the results of the injectable medications with other pills.
Scientists emphasize that individuals who shed pounds through diet and exercise generally experience a more gradual creep back—around 100 grams monthly—once they finish.
The Reason for the Fast Rebound
Nutrition scientists propose the mode of action of the drugs is key to understanding the heightened weight return.
The injections mimic a body's own chemical called glucagon-like peptide-1, which moderates hunger.
"Artificially providing the hormone levels several times higher than normal may cause the body to produce less of its endogenous hormone, and could lessen sensitivity to its effects," explained Dr. Adam Collins, a dietetics researcher.
"Discontinuation of this medication results in hunger is uncontrolled, making excessive eating a significant risk."
A Lifelong Issue?
Medical guidelines suggest the injections for people with weight-linked health risks, alongside recommended lifestyle changes.
A number of clinicians contend that, considering the high risk of relapse, the therapy should be considered life-long.
This perspective is reinforced by pharmaceutical companies, who state that the results "underscore the persistent character of obesity," comparing it to managing conditions like high blood pressure.
Patient Testimonies
Users who have discontinued the medication report a sudden return of appetite.
"It felt as if a switch flipping and you become starving," described one woman.
The struggle is exacerbated if individuals have not adopted sustainable lifestyle or habit modifications during treatment.
Widespread Use
Survey data indicate that millions of adults in the UK have used weight-loss jabs in the last 12 months, with demand being substantial.
- Adoption is greater among females than males.
- The 40s and 50s age group shows the greatest usage rates.
- Many obtain the drugs through private prescriptions rather than the NHS.
Ultimately, researchers stress that while the jabs are effective agents for shedding pounds, they are not a permanent cure and lasting health benefits relies on ongoing lifestyle support.
