What is a good RDW level?

BioForge works to an optimal range rather than the lab's reference flag. For RDW that is 11.6–13.0, measured in %. A result inside the lab's normal range can still sit outside the range where most people feel and function well.

Learn · Red Cells & Oxygen

RDW

Measured in %

How much your red cells vary in size. A quiet early-warning marker — it moves before the other counts do.

What the numbers mean

These are the ranges BioForge works to. They are not the same as a lab's reference range, which is built from the general population rather than from people who feel well.

Low

<11.6

Optimal

11.6–13.0

High

>15.4

What moves RDW

Rises with iron, B12 or folate deficiency, recent blood loss or donation, and with the recovery phase after any of those. Persistently high RDW with normal counts still deserves an explanation.

Related markers in Red Cells & Oxygen

Hematocrit (HCT)Hemoglobin RBC Count Red Cell Indices Reticulocyte Count

This page is educational and is not medical advice. Ranges are general and do not account for your history, medications or symptoms — a single number never decides a protocol. Your results are interpreted by a licensed clinician alongside everything else about you. Back to the Learning Center

Results Start Here

Want to know where your numbers actually sit?

Every BioForge protocol starts from your own bloodwork. The first 15-to-30-minute call is free.

Get Started Rather learn more first? Let's talk.