Hematocrit
The proportion of blood volume occupied by red blood cells; low values indicate anemia, high values suggest dehydration or polycythemia.
Hematocrit Biomarker Test
Hematocrit is the proportion of your blood made up of red blood cells. It is reported as a percentage on a complete blood count (CBC) and is derived from automated analyzers. Hematocrit rises or falls with changes in red cell number, size, and plasma volume. Hydration, nutrient status (iron, B12, folate), kidney-produced erythropoietin, bone marrow health, testosterone exposure, altitude, and lung function all shape hematocrit.Too low signals anemia and reduced oxygen delivery; too high increases viscosity and clot risk. Balanced hematocrit supports steady energy, clear cognition, and endurance. It is best interpreted alongside hemoglobin, red cell indices (MCV, MCH, MCHC, RDW), iron studies, vitamin B12, folate, and reticulocytes for a complete picture.
Hematocrit
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