Feosol Iron Supplement Therapy is the #1 doctor recommended iron supplement. Feosol is easy to swallow and contains 65 mg of elemental iron per tablet, which is 360% of the recommended daily value. Feosol tablets provide the body with ferrous sulfate. Feosol is an iron supplement for iron deficiency and iron deficiency anemia when the need for such therapy has been determined by a physician. This bottle of Feosol contains 125 tablets.