Our nutritionist, Benedetta helps explain what iron deficiency is and why female athletes in particular are higher in risk of developing this condition. What is Iron? Iron is an essential micronutrient responsible for transporting, storing oxygen in the body and producing energy. 65% of iron is found in the hemoglobin, 10% is bound to myoglobin in muscle tissue and the remainder is found in the liver, bone marrow and macrophages. There are two forms of iron: heme iron and non