People who stop using popular weight-loss injections like Wegovy and Mounjaro regain weight far faster than those who lose weight through diet and exercise, a major new study has found.
Research published in the British Medical Journal shows that while slimming jabs help users lose up to 20% of their body weight, most regain weight at an average rate of nearly 0.8 kg per month once they stop. At this pace, many return to their original weight within about 18 months.
By comparison, people who lose weight through traditional dieting regain weight much more slowly — around 0.1 kg per month.
Researchers warn that users should be fully aware of the high risk of rapid weight regain once injections are discontinued, especially if lifestyle changes are not adopted alongside treatment.
Experts say the drugs suppress appetite by mimicking the GLP-1 hormone, but stopping them can trigger intense hunger, making overeating more likely. Many doctors now believe the injections may need to be taken long-term to maintain weight loss.
The findings come as use of “slimming jabs” surges, with millions already using or considering them.
