Fresh analysis suggests that patients who stop using blockbuster GLP-1 drugs like semaglutide or tirzepatide tend to recover shed pounds far faster than those who stop conventional lifestyle regimens.
Findings released in a leading medical journal points out that while obese people frequently drop substantial amounts of their body weight while undergoing treatment, the mass returns at an average rate of nearly a kilo each month upon discontinuation.
"People using such treatments must be informed of the danger of fast rebound weight gain when the medication ends," cautioned lead investigator Dr. Susan Jebb.
This pace of recovery suggests a return to starting weight in about one and a half years.
Comparing Approaches
The research, which looked at 37 of studies involving thousands of patients, compared the results of GLP-1 agonists with older methods.
Scientists point out that individuals who shed pounds through dieting typically have a more gradual weight regain—around 100 grams monthly—after stopping.
Explaining the Fast Rebound
Nutrition scientists propose the mechanism of the injections explains the amplified regain.
These medications imitate a body's own chemical called GLP-1, which controls feelings of fullness.
"Sustained high doses of the hormone concentrations far above than normal may cause the system to produce less of its own natural GLP-1, and may also reduce responsiveness to its actions," explained Dr. Adam Collins, a dietetics researcher.
"Discontinuation of this hormone supplement results in hunger is uncontrolled, making overeating much more probable."
A Chronic Condition?
Medical guidelines advise the injections for individuals with weight-linked medical conditions, accompanied by recommended diet and exercise modifications.
A number of clinicians argue that, considering the high risk of weight regain, the treatment should be considered life-long.
This opinion is reinforced by drug manufacturers, who state that the findings "highlight the persistent nature of excess weight," akin to managing diseases like hypertension.
Patient Experiences
People who have come off the medication report a sudden resurgence of hunger.
"I experienced something flipping and I was suddenly ravenous," said one woman.
The struggle is compounded if patients have not adopted permanent lifestyle or habit changes during treatment.
Widespread Use
Survey data show that millions of people in the UK have used these injections in the past year, with demand being substantial.
- Adoption is greater among women than males.
- The 40s and 50s demographic shows the greatest usage rates.
- Many access the medications through private prescriptions rather than the NHS.
In conclusion, experts emphasize that while these medications are powerful agents for weight loss, they are not a permanent solution and long-term success relies on integrated behavioural management.
