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GLP-1 Receptor Agonists Likely Have Little or No Effect on Obesity-Related Cancer Risk, Research Shows

A review of 48 trials with over 51,000 GLP-1 drug users found little or no effect on risk for 13 obesity-related cancers, with follow-up averaging 70 weeks.

  • On December 8, a pooled analysis found GLP-1 receptor agonists probably have little or no effect on risk of the 13 obesity-related cancers, published in the Annals of Internal Medicine.
  • Earlier observational research suggested GLP-1 drugs such as Ozempic and Zepbound might lower cancer risk, prompting investigators to test if GLP-1–driven weight loss reduces obesity-related cancer risk despite possible confounding.
  • The analysis pooled data from 48 randomized controlled trials involving 94,245 participants, with more than 51,000 on GLP-1 medications and nearly 43,000 on placebo, and a median follow-up of 70 weeks; most trials were short and not designed to assess cancer outcomes.
  • Cancer experts responded that Dr. Bassel El‑Rayes said the results reassure current GLP-1 drug users, while the U.S. Food and Drug Administration cautions those with thyroid cancer history to avoid certain drugs and recommends longer monitoring.
  • Given the study's limitations, researchers urge longer-term cancer-specific studies since nearly 50 trials were not designed to measure outcomes and a thyroid cancer signal appeared in one study.
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19 Articles

NBC ChicagoNBC Chicago
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GLP-1 drugs have ‘little or no effect’ on risk of obesity-related cancers, study suggests

Popular weight-loss drugs “probably have little or no effect” on a person’s risk of developing one of the 13 obesity-related cancers, new research...

·Chicago, United States
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Study indicates that drugs such as Ozempic would have little effect on reducing the risk of obesity-related cancers, despite their weight benefits

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NBC LA broke the news in Los Angeles, United States on Monday, December 8, 2025.
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