An RBC count, or red blood cell count, is a blood test that measures the number of red blood cells (RBCs) in your blood. Red blood cells are responsible for carrying oxygen from your lungs to every cell in your body. They are produced in your bone marrow, the spongy tissue inside your large bones. These cells contain hemoglobin, an iron-rich protein that binds to oxygen.
An abnormal RBC count, either too high or too low, can be a sign of an underlying health condition. For example, a low RBC count may indicate anemia, while a high RBC count may suggest polycythemia vera, a condition where the bone marrow produces too many red blood cells.
A doctor may order an RBC count as part of a complete blood count (CBC) or to investigate specific symptoms like fatigue, shortness of breath, or dizziness.
Key points to remember about RBC count:
- RBCs contain hemoglobin: This protein carries oxygen throughout the body.
- Abnormal RBC counts can indicate health problems: Too few or too many RBCs can be a sign of a health condition.
- An RBC count is a common blood test: It is often performed as part of a CBC.
