Why do many independent studies suggest that all table salt should be 'iodised'?

Essentially, because salt is easy to get and can be used in the needed amounts in most dishes, and iodine efficiency is nasty (can cause goiters or lead to intellectual disabilities) . So by iodizing salt, you've got an easy and effective way to help prevent iodine deficiency, especially in areas where iodine is scarce in the foods available.


https://www.ncbi.nlm.nih.gov/books/NBK254244/
https://en.wikipedia.org/wiki/Iodised_salt
https://www.webmd.com/diet/what-is-iodized-salt
https://en.wikipedia.org/wiki/Iodine_deficiency