We now know that being low in iron is a protection against disease. Too much iron compromises the immune system while it feeds infections. Most labs in this country have normal limits for iron set too high. Low energy will never require iron but other regimens. Anemia is not necessarily iron deficiency.
Many anemias are themselves iron loading.
True low iron is an indication of chronic infection, bleeding ulcer or cancer. Iron should never be given to remedy an anemia. B vitamin deficiencies. Hemochromatosis is easy to prevent, easy to detect and east to treat. Treatment, if caught in time, will return the patient to a normal life span and reverse most if not all symptoms.