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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FYI the title is true for vegans and anyone outside of the US because the main source of iodine is from the cleaning liquid used on dairy equipment in the US that gets into the milk. Since this is not common everywhere you should consume iodized salt or take a supplement.
So the lactose intolerant are right up there? Greaaat. Any sources on this?