What It Measures
MCHC calculates the average concentration of hemoglobin packed inside each red blood cell, expressed in grams per deciliter (g/dL). It reflects how efficiently red blood cells are loaded with hemoglobin, the oxygen-carrying protein. Unlike MCH (which measures total hemoglobin weight per cell), MCHC accounts for cell size, giving a concentration ratio.
MCHC measures the average concentration of hemoglobin within red blood cells. It is a key component of the complete blood count (CBC) that helps diagnose and classify different types of anemia and monitor overall red blood cell health.
Current Value
What High Means
Elevated MCHC (hyperchromia) can indicate hereditary spherocytosis (where red blood cells are abnormally spherical and dense), autoimmune hemolytic anemia, severe burns, or hemoglobin C disease. Very high MCHC values may also be a lab artifact from conditions like lipemia, cold agglutinins, or in vitro hemolysis. Persistently elevated MCHC warrants investigation for hemolytic anemias and inherited red blood cell membrane disorders.
Possible Symptoms
Often asymptomatic; in hemolytic conditions: jaundice, dark urine, splenomegaly, fatigue, pallor, shortness of breath, gallstones from chronic hemolysis
What Low Means
Low MCHC (hypochromia) indicates that red blood cells contain less hemoglobin than normal, most commonly caused by iron deficiency anemia, thalassemia, chronic disease anemia, sideroblastic anemia, or lead poisoning. It reflects impaired hemoglobin synthesis, meaning cells are pale and less effective at carrying oxygen. Chronic low MCHC can lead to tissue hypoxia and fatigue.
Possible Symptoms
Fatigue, weakness, pallor, shortness of breath, dizziness, cold hands and feet, brittle nails, headaches, poor exercise tolerance, brain fog, restless legs
Risk Factors
Iron deficiency anemia, thalassemia, chronic inflammatory diseases, hereditary spherocytosis, autoimmune hemolytic anemia, vitamin B6 deficiency, lead exposure, sideroblastic anemia, liver disease, hypothyroidism, chronic kidney disease
Actionable Advice
Supplements
- •Iron (if deficient)
- •Vitamin C (enhances iron absorption)
- •Vitamin B6 (supports hemoglobin synthesis)
- •Folate
- •Vitamin B12
- •Copper (cofactor for iron metabolism)
- •Vitamin A (supports iron mobilization)
Diet & Lifestyle
- •Eat iron-rich foods: red meat, organ meats, dark leafy greens, lentils
- •Pair iron-rich foods with vitamin C sources to enhance absorption
- •Avoid drinking tea or coffee with meals (tannins inhibit iron absorption)
- •Cook with cast iron cookware to increase dietary iron
- •Address any chronic inflammation or gut issues that impair nutrient absorption
- •Get regular bloodwork to monitor iron studies alongside CBC
- •Avoid excessive calcium supplements with iron-rich meals
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Historical Trend
Related Biomarkers
Resources & Studies
All Readings
| Date | Value | Change |
|---|---|---|
| 2025-09-18 | 33.9 g/dL | +1.8 |
| 2025-08-25 | 32.1 g/dL | -1.7 |
| 2025-07-31 | 33.8 g/dL | -0.8 |
| 2025-06-27 | 34.6 g/dL | — |