What Year Did They Start Adding Iodine to Salt?
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7 min read
The first iodized salt appeared on grocery store shelves in Michigan on May 1, 1924, marking a pivotal moment in public health history. This initiative was a response to widespread iodine deficiency, particularly in the "goiter belt" region of the Great Lakes and Northwest. The story of how they began adding iodine to salt is a tale of scientific discovery, public health advocacy, and a simple solution to a devastating problem.