Hormonal
Current clinical evidence from randomized controlled trials and meta-analyses does not support a causal link between GLP-1 receptor agonist use and an increased risk of thyroid cancer in humans.
If you are considering or taking a GLP-1 medication (like Ozempic or Wegovy) and are worried about thyroid cancer, know that large human studies have not found a proven link. The warning on the label comes from animal studies, not human outcomes. While you should be aware of symptoms, the proven benefits for weight loss and heart health generally outweigh this unproven risk. Do not stop your medication without talking to your doctor, especially if you have a family history of specific thyroid cancers (MTC), which is a separate contraindication.
Evidence from randomized controlled trials indicates occurrence of thyroid cancer is infrequent in individuals exposed to GLP-1 RA. ... Overall there is no conclusive evidence of elevated thyroid cancer risk.
Why this rating
The review prioritizes RCTs and meta-analyses as the strongest evidence for causality, noting they show infrequent occurrence.
Source
Glucagon-Like Peptide-1 Receptor Agonists and Thyroid Cancer: A Narrative Review
Ana E. Espinosa De Ycaza et al. · Thyroid · 2024
DOI 10.1089/thy.2023.0530
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This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →