Red Cell Distribution Width (RDW) Isn't Widely Known

The Red Cell Distribution Width (RDW) isn't well known but it is an important topic when it comes to red blood cells. The RDW indicates whether there is a wide variety of red blood cell sizes present which can reflect a mixture of different types of anemias, including microcytic (small red blood cell) and macrocytic (large red blood cell) anemias, and can help us identify different nutrient insufficiencies.

Small red blood cells are associated with iron deficiency anemia, the most common cause of anemia worldwide. Large red blood cells are associated with vitamin B12 deficiency, another common cause of anemia.

The RDW is part of the Complete Blood Count (CBC) report and a suboptimal high RDW should be explored further as it is an indication that anemia is present.

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