About Red Blood Cell Count
Your red blood cell count (RBC) measures the total number of red blood cells circulating in your blood, directly reflecting your blood's oxygen-carrying capacity. A low RBC often accompanies anemia and can explain fatigue and shortness of breath, while an elevated count may indicate dehydration or a bone marrow condition driving excess production. It's best interpreted alongside hemoglobin, ferritin, and MCV (mean cell volume) for a complete picture.