I've read that one of the reasons that thyroid cancer is so prevalent in east Asia is due to seaweed consumption. Seaweed has 10,000x times the iodine of other food products, and a percentage of that iodine is potentially radioactive. I don't have a source so take this with a grain of (uniodized) salt.
Edit: since, I'm getting downvoted, here's a study:
Then you keep the seaweed for 90 days and it's not radioactive anymore? Iodine 131 has an 8 day halflife, which means it's gone <1/1024 in 90 days. It decays to stable xenon 131 which gets vented.
Which also makes the hysteria against uniodized salt also look like a qanon conspiracy theory.
I'm unaware of any conspiratorial hysteria regarding salt. I only thought that I'd mention something I had found while researching causes for thyroid cancer, which I got while living in east Asia.
Edit: since, I'm getting downvoted, here's a study:
https://www.jstor.org/stable/48504137