Borrowed from another poster...Article from Dr F on Iron
"My endo, Dr F., puts his patients on an OTC product called, Iron Sorb. I have zero GI symptoms.!!!!
Initially my ferritin was at 10 and is now reliably at 70-80. That's the level you want to keep it at.
Here's the white paper he's written for his patients and docs to read. It will give you specific instructions on how many iron sorb pills to take a day depending on your current ferritin level. Also a link to the product and how frequently you should retest your level. It makes a huge difference when it gets to the right range!!!"