Sorry for being so demanding, but how do you know that you're getting enough iodine in your diet?
That is not easy to tell. Symptoms can somewhat of an indicator, but even at that this is not 100%. For example again a person can have Hashimoto's, which still causes hypothyroid symptoms but for which more iodine is not good.
And sea salt - heavy metal, is it something to take in to account, cause I do use it a lot.
That is another reason I prefer seaweeds. Seaweeds contain algins that bind heavy metals preventing them from affecting the body.