Hello and Congratulations on choosing the MC!
As far as finding uniodized Sea Salt , this was somewhat of a challenge for me as well. If you have any health food stores, you can call them first and ask them to check to see if there are no additives and if the Sea Salt is uniodized before venturing out to get it. I found the uniodized Sea Salt at a store that also carries the senna leaf laxative tea, so if you can kill two birds with one stone than go for it!
Good luck and my advice, stick to it, don't give up!