Iodine is crucial for thyroid function. RDA: 150mcg daily. Plant sources: seaweed (varies widely), iodized salt (400mcg/tsp), cranberries (400mcg/4oz). Many vegans are deficient - supplementation may be needed.

I use kelp granules on salads. Just 1/4 tsp provides 350mcg!

Too much iodine from seaweed can be harmful. I stick to iodized salt and supplement 150mcg.

Got my thyroid tested - levels perfect with daily multivitamin containing iodine.