Mean corpuscular haemoglobin concentration: haemoglobin concentration within red cells.
What it is
MCHC is typically reported in g/L in UK FBCs. It is relatively stable; extreme values sometimes flag artefacts or uncommon red-cell disorders.
Mean corpuscular haemoglobin concentration expresses how densely haemoglobin fills the average red cell (g/L). It is more stable than MCV/MCH; big swings often trigger analyser flags or film review.
Why it matters
Extreme MCHC values can flag iron issues, spherocytosis, cold agglutinins, or sample artefacts (lipaemia, haemolysis). Labs often comment when indices disagree with the film or analyser flags.
Mild isolated shifts in a well person are usually watched. Significant abnormalities belong with a clinician and the rest of the FBC.
This guide is educational only and cannot diagnose you. Discuss results, especially anything outside your laboratory’s reference interval, or that does not match how you feel, with a GP or other appropriately qualified clinician.
How it affects the body
MCHC estimates haemoglobin concentration inside red cells. Membrane disorders that shrink cells can raise MCHC; iron-deficient haemoglobinisation can lower it. Artefacts matter because machines infer indices from optical or impedance signals.
For athletes
Seldom the headline marker in sport science panels. If MCHC is flagged abnormal after a hard block, prioritise hydration, repeat testing, and clinical review over changing training from this number alone.
Related tests
Panels that include Mean corpuscular haemoglobin concentration.
