Iron and your health
If you feel run-down, lack of iron is probably not the cause. You can easily get enough of this key mineral in your diet.
Decades ago, advertising for the liquid vitamin and mineral supplement Geritol warned against "iron-poor, tired blood." It's a reference to the fact that red blood cells need iron to make hemoglobin, the molecule that grabs oxygen and transports it around the body.
If you feel fatigued, the reason is unlikely to be a lack of iron. On the other hand, if your iron stores are low, you would definitely want to know about it.