i have an iron deficincy, and if you take the pills right it's ok.i have not heard of it being dangerous; and if you have iron deficiency, by all means take them--you'll start feeling better. it's an easy problem to correct. they're usually generated in a small amount anyway and in not enough amounts to hurt you. now, i don't know about iron pills being dangerous at all, but i do know that IODINE pills, which have to do with your thyroid, if taken excessivly, will give you poisining.