Iron is an important building block to make hemoglobin, the oxygen carrying molecule of red blood cells. Without iron your body will have problems creating red blood cells
Iron deficiency can come from various reasons, the most important low dietary intake, problems absorbing iron from the intestine (diseases like celiac disease) or excessive losses (bleeding due to cuts, surgery or menstruation)
Anemia is a low amount of hemoglobin in your blood. It may be production problems like low iron availability, genetic diseases that inhibits hemoglobin production (thalassemia, sickle cell disease) or blood loss.
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