The RDW( Red Cell Distribution range) is a measure of the variation in size of red blood cells( erythrocytes) in a blood sample. It’s generally reported as a percentage. The RDW provides information about the degree of anisocytosis, which refers to the variation in the size of red blood cells.

A low RDW isn’t generally considered a cause for concern on its own. It can be seen in certain conditions, similar as iron insufficiency anemia, where the red blood cells come lower and further livery in size. Other types of anemia, similar as thalassemia or habitual complaint anemia, can also lead to a low RDW.

RDW is frequently used as a part of a complete blood count( CBC) test and can give precious information about the health of a person’s blood cells. A high RDW may indicate several possible conditions or factors, including

RDW can be elevated in different types of anemia, similar to iron insufficiency anemia, vitamin B12 insufficiency anemia, and folate insufficiency anemia. In these conditions, the bone marrow may produce red blood cells that vary in size. Certain nutrient scarcities, similar as iron, vitamin B12, or folate scarcities, can lead to changes in red blood cell size and affect a high RDW.