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justroommatethings t1_irg0nqe wrote on October 7, 2022 at 8:29 PM

Reply to comment by [deleted] 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

Canada has not banned fluoride in water. My city has a fluoridated water system, and as of 2017 (the last available report with census data), about 40% of the population lives in communities with fluoridated water.