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Iron metabolism


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ferric iron
Main form of iron in food, +3 oxidation state
ferrous iron
Main form of iron in cells, +2 oxidation state
transferrin
Carrier protein for ferric iron in the plasma (with iron bound)
ferritin
Iron storage protein used as an indirect estimate of body iron stores
ferroportin
Transporter that carries ferrous iron out of cells
hepcidin
Protein that decreases the amount of ferroportin in cell membranes
apotransferrin
Carrier protein for ferric iron in the plasma (without iron bound)
ascorbate
An example of a substance in food that increases iron absorption
tannin
An example of a substance in food that decreases iron absorption