the provision of what is needed for the well-being or protection of a person or thing: He is under the care of a doctor. With proper care, the watch will last a lifetime. temporary keeping, as for the benefit of or until claimed by the owner: He left his valuables in the care of friends.
Iron is used more than any other metal for producing metal alloys. The most important iron alloys include cast iron, pig iron, wrought iron, and steel. There are various alloys of steel, but they all contain iron as the main metal. Carbon is one of the main alloying elements mixed with iron to make steel.
Iron supplements are used to treat iron deficiency and iron-deficiency anemia; parenteral irons can also be used to treat functional iron deficiency, where requirements for iron are greater than the body's ability to supply iron such as in inflammatory states.