Ferritin
Ferritin is a protein that stores iron inside your cells. You need iron to make healthy red blood cells. Red blood cells carry oxygen from your lungs to the rest of your body. Iron is also important for healthy muscles, bone marrow, and organs, including brain development in children.
Why a doctor may order this
To assess iron stores; low in iron deficiency, high in iron overload or inflammation; key in anaemia work-up.
Why you may need this
Best test for iron stores — if you have fatigue, heavy periods, hair loss, or restless legs; also checks overload.
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