Oxygen
It is an iron-based protein called hemoglobin.
The hitties kep a secret of their ability to make iron because they were very skilled fighters and their ability to make iron made them powerful.
Low iron is associated with Anemia. I have low iron (low hemoglobin) levels. It is called being anemic. It is usually fixed with taking iron supplements.
Transferrin in the blood carries iron to the bone marrow
An iron is a type of golf club.
Iron deficiency anemia
Iron
Iron
iron
Iron and oxygen together.
The ability to make weapons made of iron
The ability to make weapons made of iron