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Learn · Red Cells & Oxygen

Hemoglobin

Measured in g/dL

The oxygen-carrying protein inside red cells. Moves in lockstep with hematocrit.

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
<13.5
Optimal
14.0–16.5
High
>17.7 · >18 = act

What moves Hemoglobin

Same drivers as hematocrit. Falling hemoglobin with normal iron can signal bleeding, kidney disease, or overly aggressive phlebotomy.

Related markers in Red Cells & Oxygen

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

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