Iodine deficiency is often seen as a problem of the past, but this isn’t entirely true. During the 20th century, the iodization of salt became one of the most effective public health interventions for preventing conditions caused by a lack of this mineral, including goiter (enlargement of the thyroid gland) and preventable damage to neurological development.
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Interesting. Iodine was a thing my grandmother loved a lot. She’d go on about food additives and how amazing iodine salt was because she remembered how everyone where she’d live would have goiters. Then iodine salt and boom! No. And much less scurvy and stuff. I think she was always hopeful food science would get to the point of all vitamins inside everything somehow lol.