Hi, I had thyroid Cancer five years ago, Papillary Carcinoma.....I had a thyroidectomy and eight lymph nodes removed due to metastasizing cancer.....my question is, is it safe to take iodine pills for water purification when camping etc.....as I do have my TSH levels checked every 6 months, because of taking Levothyroxine.....just wondered if it is safe, or would it elevate my iodine levels to the point of being unsafe?