the body needs iodine to manufacture the thyroid hormones - and low levels of that can cause lower production.
its also relatively common for people in the western world to be deficient in iodine - as we move towards more processed foods and the soil minerals are depleted - this was the reason the USA introduced iodised table salt.
highest sources are generally from seafood - so if your child does eat much of that then its certainly possible.
there is reason to be a little cautious with supplementation as high doses of iodine have been linked to flaring autoimmunity - otherwise it seems very safe
thyroid experts i have read seem to agree 200-400micrograms a day - ideally in the form of iodide and iodine mixed - is a safe level of supplementation even for those with hashimotos - but you may wish to get the results of antibody tests before deciding on dose
also beware the "normal" ranges for thyroid hormones - our populations have been getting sicker over the last 40 years and the "normal ranges" have been substantially widened as a result
a healthy person should not have a TSH above 2 - if its higher than that something is going on
pituitary tumours etc do happen - but are extremely rare compared to deficiencies and autoimmunity - they are normally diagnosed by radically unexpected hormone levels - not small increases over median.
Good info. Thanks for sharing.
I do have a different perspective with the dosing personally though, as I think dosage will vary per individual's needs. I had been researching iodine previously, but I wasn't confident enough to use it until this year. Despite our thyroid levels always in the "normal" range, I'm using it for other reasons than thyroid for myself and one of the kids, at a much higher dosage than stated in your message, under the guidance of a doctor for us. I regret being so hesitant on this one previously and should have started it earlier.yep - some people use more - some much more - but since there was a possibility of auto-immune issues in the mix i did not want to advocate it until more was known.
there was even a case of a guy on youtube curing himself of a really bad case of morgellons by using huge doses - very interesting account - "unknown cat" was his name if you wanted to look him up - he thought he had a fungal infection - but it was clearly morgellons - which appears to be mostly associated with lyme and bart.