Iodized salt has less usage in US & Europe compared to Asian & African countries?
I was reading the iodized salt Wikipedia page and came to know the stat that was stating that US & Europe has almost negligible iodized salt intake if not nil while it's heavily consumed in African and Asian countries. Is it true? If yes, then is there a reason as to why US & Europe not taking iodine salt if it really improves the health and IQ of the people?
The chart is mentioned on the below page.
https://en.wikipedia.org/wiki/Iodised\_salt
Kindly share your thoughts. Thanks.