Hematocrit and High Altitude: Understanding Red Blood Cell Adaptation

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People who live in high altitudes have higher red blood cell counts and hematocrits than people who live at sea level. This is because the body produces more red blood cells in response to the lower oxygen levels at high altitudes. Red blood cells carry oxygen from the lungs to the rest of the body, so having more of them helps to ensure that the body gets enough oxygen. The increased hematocrit in people who live at high altitudes is a compensatory mechanism that helps the body adapt to the lower oxygen levels. However, extremely high hematocrit levels may increase the risk of blood clots or strokes.