This may help

http://www.youtube.com/watch?v=5ahlawrQHeA

In the video above, we see that General Mills cereal contains actual inorganic iron filings, which is added to the manufacturing process so they can claim that it is "fortified." This kind of "fortification" of foods has mainly to do with the fact that processed foods are DEVOID of any kind of nutrition, so in order to sell people on them, they "fortify" them. The problem with this is that their methods of doing so then turn their already non-nutritional foods into poison time bombs. It was for this reason that I urge others to prepare foods from scratch whenever practicle.

Notice in the comments section of the video, a shill from either one of the big agro/food combines or lobbying agency going on and on about how this is good for you and necessary. In point of fact, this kind of fortifying is rejected by the body, causes damage to the kidney, liver, and brain.
Eating inorganic metals like iron filings is simply poisoning your body. With poisons. Metal flings can shred organs, like your alimentary canal.

Go scratch. Go organic. Stay away from anything "fortified."

And save your life and the lives of those you love now.