More info on iodine here: http://articles.mercola.com/sites/articles/archive/2012/02/08/iodine-is-important-but-new-study-shows-too-much-causes-problems.aspx
If you’re worried about it – why not eat some seaveggies/seaweed? Our local groceries (Seattle area) carry seaweed salads with a sesame oil dressing that have great crunch and are very tasty.
Spirulina is apparently another natural source of iodine.
Do you use iodized salt? Eat any processed/enriched foods? they probably have been iodized, too…