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zoicyte t1_ireni1d wrote on October 7, 2022 at 2:16 PM

Reply to comment by __life_on_mars__ in TIL A 2017 study found that the introduction of iodized salt in 1924 raised the IQ for the one-quarter of the population most deficient in iodine. by kstinfo

this is the correct answer.

also while kosher salt is not about iodine content, i'm pretty sure it's generally not iodized. i've never seen iodized kosher salt, personally, anyway.