Iron is a mineral that the body needs for growth and development. Your body uses iron to make hemoglobin, a protein in red blood cells that carries oxygen from the lungs to all parts of the body, and myoglobin, a protein that provides oxygen to muscles. Your body also needs iron to make some hormones.
Iron helps with energy and focus, gastrointestinal processes, the immune system, and the regulation of body temperature.
Symptoms of iron deficiency:
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Being pale or having yellow "sallow" skin
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Unexplained fatigue or lack of energy
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Shortness of breath or chest pain, especially with activity
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Unexplained generalized weakness
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Rapid heartbeat
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Pounding or "whooshing" in the ears
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Headache, especially with activity
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Craving for ice or clay
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Sore or smooth tongue
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Brittle nails or hair loss
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Anemia