start Iodine asap. i recommend 400mcg of selenomethionine the first year and then 200mcg per day for life.
triboron from twinlabs - 9mg per day.
i also suggest liberal use of borax for a variety of personal and household uses. i have it in my hot tub. i was my clothes in it. i scrub apples and tomatoes with it. i have even brushed my teeth with it occasionally and washed up with it in the shower. just as the spirit leads.