[header] How to treat iron deficiency anemia [title] Choose a ferrous iron supplement. [step] Iron can exist in two ionic forms: ferrous and ferric. Ferrous supplements are better absorbed than ferric. 
These include ferrous sulfate, ferrous gluconate, ferrous fumarate, and ferrous citrate. Ferronyl is another form of iron that is better absorbed and commonly used in treatment of iron deficiency anemia.