This week, research presented at the European Congress on Obesity suggested that weight-loss injections – also known as GLP-1 receptor agonists – may have significant anti-cancer benefits, beyond simply helping people shed pounds. Researchers believe these potential effects may be linked to the drugs' ability to reduce inflammation, with newer GLP-1 medications showing the most promise.
These drugs work by suppressing appetite, making it easier to lose weight. They're available on the NHS for people with a high BMI and can also be accessed privately. However, experts are urging caution. One scientist noted:
"This study, whilst interesting, cannot confirm or refute any links between incretin-based therapies and cancer. It was observational rather than a clinical trial, and the groups had notable differences in baseline characteristics that simply can't be matched."
In the same week, another study suggested that weight-loss jabs might help curb alcohol cravings and reduce drinking. Again, scientists responded with a note of scepticism. Colin Angus, Professor of Alcohol Policy at the Sheffield Addictions Research Group, said: "This study followed a few hundred patients attending an obesity clinic who were prescribed GLP-1 weight-loss drugs and found that they were drinking significantly less after around four months. But without a control group, we can't say whether this reduction was due to the drugs or simply part of their broader effort to lose weight."
He added that while it's plausible GLP-1 medications could affect alcohol intake, it's just as likely that people trying to get healthier might naturally cut back on drinking. Dr Stephen Burgess, a statistician at the MRC Biostatistics Unit at the University of Cambridge, echoed that caution: "This kind of research is highly vulnerable to confounding. Changes in alcohol consumption before and after treatment could be due to reasons unrelated to the drug itself. For instance, people may spontaneously reduce their drinking simply because they're taking medication."
These scientific caveats highlight a bigger question that continues to follow the rise of weight-loss jabs: are they truly "miracle drugs," or are many of the reported benefits simply the result of weight loss itself?
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