The inorganic iron does supply a little iron and the rest of it causes more and more problems.
The herbal iron formula has little iron in it, it enables the body to use the iron it already has. It works very well, it actually may be one of the greatest of cures because if you can stop "PICA" you may actually stop all disease. Pica is stopped when the body has all the nutrients in usable form it needs. I have read most disease is because of the lack of usable iron in humans and animals.