I'm sure an expert will be along shortly to tell you why an excess of iron is a bad thing, but in the meantime I can tell you that Dr. Atkins said we're getting enough iron from all the protein we're eating. You don't need the iron in most multi-vitamins, although I'm not sure if it's actually harmful or not.

I take One-A-Day for people over 50 (I'm 23!) It contains no iron.