LONDON, January 8, 2026 – patients who stop taking popular weight-loss drugs like Wegovy and ozempic rapidly regain weight-averaging a return to their original weight within 1.7 years-according to a new study, raising questions about the long-term sustainability of these medications.
The Rebound Effect: Why Stopping GLP-1s Can Be So Difficult
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A recent analysis reveals that individuals discontinue GLP-1 medications, they regain weight four times faster than those following traditional behavioral programs.
- GLP-1 drugs are highly effective for weight loss and offer additional health benefits.
- Weight regain is rapid and ample when medication is stopped, occurring on average within 1.7 years.
- Secondary health benefits, like improved blood pressure and cholesterol, also reverse after stopping treatment.
- A comprehensive approach combining medication wiht lifestyle changes is crucial for long-term success.
Glucagon-like peptide-1 (GLP-1) receptor agonist drugs, including Wegovy and Ozempic, have demonstrated remarkable effectiveness, not only in promoting notable weight reduction but also in offering a range of other health advantages. These include a reduced risk of heart disease, protection against diabetic kidney disease, and potential benefits for conditions like Parkinson’s and Alzheimer’s.
The Challenge of Long-Term Maintenance
However, the reality of discontinuing monthly injections presents a significant challenge. Researchers from the University of Oxford published their findings in the journal Diabetes,Obesity and Metabolism on January 8,2026. The study followed over 14,000 individuals and found that after stopping GLP-1 medication, participants regained an average of two-thirds of their lost weight within a year, and returned to their starting weight within 1.7 years. any improvements in secondary health markers, such as blood pressure and cholesterol levels, were also lost.
Study author Dr. John Smith wrote. “These findings suggest caution in short-term use of these drugs without a more comprehensive approach to weight management.”
Senior author and Oxford associate professor Dimitrios Koutoukidis explained in an official statement that the rapid regain might potentially be due to a lack of ingrained lifestyle changes. “This faster regain could be because people using drugs don’t need to consciously practice changing their diet to lose weight, so when they stop taking the medication, they might not have developed the practical strategies that could help them keep it off.”
A Call for a Holistic Approach
Lead author and University of Oxford research scientist Sam West emphasized the transformative potential of these medications while acknowledging the challenges of long-term maintenance. “These medicines are transforming obesity treatment and can achieve critically important weight loss,” West said in the statement.”However, our research shows that people tend to regain weight rapidly after stopping – faster than we see with behavioral programs.”
west added, “This isn’t a failing of the medicines – it reflects the nature of obesity as a chronic, relapsing condition. It sounds a cautionary note for short-term use without a more comprehensive approach to long-term weight management, and highlights the importance of primary prevention.”
Diabetes UK research communications lead Faye Riley told The Guardian that weight loss drugs are “effective tools for managing weight and type 2 diabetes risk – but this research reinforces that they are not a quick fix.” Riley stressed the need for “appropriately prescribed” medications alongside “tailored wraparound support” to maximize benefits and sustain weight loss after treatment ends.
