A metallic element with atomic symbol Fe, atomic number 26, and atomic weight 55.85. It is an essential constituent of HEMOGLOBINS; CYTOCHROMES; and IRON-BINDING PROTEINS. It plays a role in cellular redox reactions and in the transport of OXYGEN.

An element with atomic symbol Fe, atomic number 26, and atomic weight 55.85.

An important mineral the body needs to make hemoglobin, a substance in the blood that carries oxygen from the lungs to tissues throughout the body. Iron is also an important part of many other proteins and enzymes needed by the body for normal growth and development. It is found in red meat, fish, poultry, lentils, beans, and foods with iron added, such as cereal.

Iron is a mineral that our bodies need for many functions. For example, iron is part of hemoglobin, a protein which carries oxygen from our lungs throughout our bodies. It helps our muscles store and use oxygen. Iron is also part of many other proteins and enzymes. Your body needs the right amount of iron. If you have too little iron, you may develop iron deficiency anemia. Causes of low iron levels include blood loss, poor diet, or an inability to absorb enough iron from foods. People at higher risk of having too little iron are young children and women who are pregnant or have periods. Too much iron can damage your body. Taking too many iron supplements can cause iron poisoning. Some people have an inherited disease called hemochromatosis. It causes too much iron to build up in the body. Centers for Disease Control and Prevention

Metallic element found in certain minerals, in nearly all soils, and in mineral waters; atomic symbol Fe, atomic number 26, and atomic weight 55.85; it is an essential constituent of hemoglobin, cytochrome, and other components of respiratory enzyme systems; chief function is in the transport of oxygen to tissue (hemoglobin) and in cellular oxidation mechanisms.

The amount of circulating iron bound to transferrin is reflected by the serum iron level. The serum iron reference range is 55�160 �g/dL in men and40�155 �g/dL in women.