For me, that hasn't even been the case. I'm down 40lbs on a relatively low dose of Semaglutide and my muscle mass has moderately increased over the last 6 months. The hysteria over this is totally unfounded.
https://scholar.google.com/scholar?as_ylo=2024&q=glp+1+thyro...
https://www.liebertpub.com/doi/abs/10.1089/thy.2023.0530
> Overall there is no conclusive evidence of elevated thyroid cancer risk.
https://dom-pubs.onlinelibrary.wiley.com/doi/full/10.1111/do...
> Our meta-analysis showed that GLP-1RA treatment could be associated with a moderate increase in relative risk for thyroid cancer in clinical trials, with a small increase in absolute risk. Studies of longer duration are required to assess the clinical implications of this finding.
It's potentially a possibility, but the absolute risk seems to still be quite low.