Feosol Original contains ferrous sulfate, a form of iron widely recommended by doctors. In fact, for decades it was the most doctor-recommended form of iron. When your doctor suggests an iron supplement for iron deficiency anemia or low iron, ferrous sulfate is a safe and time tested form of iron. Each Feosol Original tablet contains 65 mg of elemental iron, equivalent to 325 mg of ferrous sulfate, which provides 360% of Daily Value, making it a high potency iron supplement. Feosol has been a leader and innovator of iron supplements for seventy years. Feosol offers three distinct types of iron each with unique benefits.