Ferritin wani hadadden sunadaran gina jiki ne wanda ke taskance iron kuma yana fitar da shi cikin tsari mai inganci lokacin da jiki ke bukatarsa. Ana samunsa a cikin hanta, da mashi, da maƙarƙashiya, kuma yana taimakawa wajen kiyaye ma'aunin ƙarfe na jiki. Hakanan ana amfani da Ferritin a wasu lokuta azaman alamar bincike don yanayin kiwon lafiya daban-daban, gami da ƙarancin ƙarfe anemia, cutar hanta, da wasu nau'ikan ciwon daji.