And yet, levels have been measurably going down, and Europeans are already fairly deficient since they don't have as many iodine supplementation programs: http

And yet, levels have been measurably going down, and Europeans are already fairly deficient since they don't have as many iodine supplementation programs: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9459956/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9459956/ https://www.cdc.gov/nchs/data/hestat/iodine.htm https://www.cdc.gov/nchs/data/hestat/iodine.htm