was ist ein normaler hämoglobinwert — what are common causes?

A normal hemoglobin (Hb) level in adults is roughly 12–16 g/dL for women and 13–17 g/dL for men, with slight lab variation. Common causes of low Hb (anemia) include iron deficiency, vitamin B12/folate deficiency, chronic inflammation, blood loss, or kidney disease. Elevated Hb (polycythemia) can result from dehydration, smoking, chronic lung disease, or sleep apnea. Rare genetic causes like hemoglobinopathies (e.g., thalassemia) also exist. Important: a single Hb value is a snapshot; further tests (ferritin, MCV, reticulocytes) are needed for workup. MyBody-X tests do not diagnose – consult a doctor for abnormal results. Evidence for normal ranges and causes is based on clinical practice and guidelines.