What do your red cell distribution width levels mean?
The short answer
Nobody we follow has said what your red cell distribution width should be. It comes up on the shows, but never with a number.
Your lab prints 11.5–14.5 %. That range exists to catch disease, not to describe your best.
What red cell distribution width measures
How much your red blood cells vary in size.
A wide spread often appears early in iron or vitamin shortage, before average size has shifted.
Checked against MedlinePlus — RDW (Red Cell Distribution Width).
Common questions
What is a normal red cell distribution width level?
Most US labs print 11.5–14.5 %. Your report grades you against that range. It exists to catch disease, not to describe your best.
What does your red cell distribution width number mean?
Under 11.5 %, your report marks it low. Between 11.5 and 14.5 it prints as normal. Over 14.5, your report marks it high. Nobody we follow has drawn a line inside that range.
What does the red cell distribution width test measure?
How much your red blood cells vary in size. A wide spread often appears early in iron or vitamin shortage, before average size has shifted.
Why is there no target here?
Because nobody we follow has named a number for red cell distribution width. If that changes, it will be here.