Its a good idea to have home insurance right? Why not buy insurance for your thyroid? IOSAT tabs block radioactive iodine from your thyroid and will save your life in a nuclear attack or disaster. This brand runs fairly cheap and has a decent shelf life of seven years. Imagine what the people on Hawaii would have done to get a few of these packets when they had that false warning of a ICBM incoming… I can not stress more to family members to buy cheap insurance policies like this. God forbid that you will need them, if you do need them you can rest assured you made the right choice to buy them!