10/08/2026
The thyroid warning on GLP-1 medicines can sound scary. What does it actually refer to?
Dr. Jonas explains that it concerns C-cell tumors observed in rodent studies, and that it’s unclear whether this finding is relevant to humans. The warning he discusses isn’t about every thyroid condition, such as an underactive or overactive thyroid or a thyroid nodule.
Talk with your clinician about your own history and medication questions.