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Iron (Fe) is a trace element that contributes to the composition of the protein called Hemoglobin. Hemoglobin is carried in red blood cells. Hemoglobin's main job is to carry oxygen throughout the body. So, when a person does not have enough iron in their body, they will begin to feel drowsy and fatigued, because the proper amount of oxygen is not available. This condition is called Anemia.

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iron
Iron is the element that is a necessary part of hemoglobin.

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Q: What trace element is needed to make hemoglobin for oxygen transport?
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