A few millilitres of blood from a vein are required. Iron studies are carried out in the form of a blood test. Transferrin – a protein which caries iron in the blood it may be increased in the presence of inflammation or infection anywhere in the body and is therefore less useful.Serum iron – the next most useful component, giving an estimate of iron being carried in the blood.
Ferritin – the most accurate marker of total body iron stores and the first component to fall in the setting of iron deficiency.
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