Erythrocytes, or red blood cells, are the most abundant cells in your blood. They transport oxygen from your lungs to all organs and tissues.
Normal values
Men: 4.5-5.5 x10^12/L. Women: 3.8-5.0 x10^12/L. The difference is largely due to testosterone stimulating red blood cell production.
Too low (anaemia)
Most commonly caused by iron deficiency (especially in menstruating women), B12/folate deficiency, chronic disease, blood loss or kidney problems. Symptoms include fatigue, pallor, dizziness and shortness of breath.
Too high (polycythaemia)
Causes include dehydration, smoking, high altitude, lung disease and rarely polycythaemia vera.
Frequently asked questions
Can I raise my erythrocytes myself?
If caused by nutritional deficiency (iron, B12, folate), diet and supplements can help. Other causes require medical treatment.
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