For oral iron supplements used for iron deficiency anemia :

The tolerable dose of elemental iron is 200 mg per day in three divided doses i.e. app. 60 mg per dose. Mass of elemental iron is more important in determining daily dose rather than a mass of total salt because different salts provide a different amount of elemental iron. Treatment with oral iron should be continued even after reaching the desired hemoglobin level to replenish the stores. The desired rate of hemoglobin improvement is 0.5 to 1 mg per week (not day).