Tired – as in extremely, consistently fatigued. Run down. Washed out. Pale. Diminished appetite. Performances spiralling downward. Reduced endurance. Cold hands and feet. Headaches. Light-headedness. Irritability. Repeated infections. Any of these sound like you? If so, you may be low on iron. Iron is a trace mineral required for energy and endurance. At any one time, there should be 3-5 grams …