Geri-Care® Mineral Supplement Iron 325 mg Strength Tablet 200 per Bottle (1150846_CS) 12/CSEach tablet contains 325 milligrams of ferrous sulfate, providing approximately 65 milligrams of elemental iron. Elemental iron supplement works to neutralize anemia and iron deficiency by increasing the body's production of red blood cells. Iron is often prescribed as a prenatal vitamin: This bottle, with 200 tablets, will last almost the entire period of gestation.