I would like to know how necessary iodine supplementation really is. i know you can get iodine from seaweed naturally, but most people dont eat that everyday, if at all. then plants contain iodine if the soil contained it. hows the situation with most soils in agriculture today? for reference i googled that a sweet potato has about 10mc iodine/100g on average, just like rice. such amounts would easily get you 2 times the rda or even more without supplementing. but those were from a country in africa. how is it in europe and the us?
Keep in mind that the salt loses the iodine in 3 months, so if you bought and it’s chilling on your counter, it’s likely useless.
In some regions (my part of Eastern Europe for example) you have to supplement constantly. In my case I have to take 200 mcg a day, otherwise there are thyroid problems and weird rashes. But it depends on your everyday diet and body. I discovered I have no allergy (after a week at hospital), I just needed iodine lol