Iodine defiency

Many people said that I should go here and learn about Iodine after I posted about my long battle with facial scarring and their inability to heal even though I have an exceptional diet.

One person said that Iodine is extremely common today. I looked up "iodine defiency" on google and every single piece of information said that an Iodine defiency is extremely rare, especially in the united states.

I do not use table salt , but I do use an unrefined himalayan Sea Salt . I use a lot of it (i like salty food and I know it is good for me with all of the minerals)

How would I be deficient if I eat a lot of this Sea Salt ?

Also, what is a Halide imbalance? One user said that if I correct my halide imbalance that my scars will disappear? I have never heard of anything like that! Halide imbalances in regards to scarring.

How do I test for a iodine defiency or a halide imbalance?

Other people have recommended bone soups. I am a vegetarian and do not believe that any animal product is either healthy or safe (organic, free range or not).

I know for a fact that bone soup from fish tends to be highly contaminated with ocean pollutants (i looked it up).

thanks so much for your help