<prompt> Iron is predominantly absorbed inStomachDuodenumColonIleum  <response>: Almost all iron absorption occurs in the duodenum. Transpo of Fe2 into the enterocytes occurs divalent metal transpoer 1 DMT1. Some are stored in ferritin, and the remainder is transpoed out of the enterocytes by a basolateral transpoer named ferropoin 1. A protein called hephaestin Hp is associated with ferropoin 1. It is not a transpoer itself, but it facilitates basolateral transpo. In the plasma, Fe2 is conveed to Fe3 and bound to the iron transpo protein transferrin. This protein has two iron-binding sites. Normally, transferrin is about 35 saturated with iron, and the normal plasma iron level is about 130 mgdL 23 mmolL in men and 110 mgdL 19 mmolL in women.Ref: Ganong;s review of medical physiology 23rd edition Page no: 452 