was ist ein normaler hb wert — when to see a doctor?

The question about normal hemoglobin (Hb) levels cannot be answered from the provided context, which focuses on DNA tests, allergies, metabolism, and hormone panels. Generally accepted reference ranges for adults are: men 13.5–17.5 g/dL, women 12.0–15.5 g/dL (slight variations by lab). You should see a doctor if your Hb is outside this range, especially with symptoms like fatigue, pallor, shortness of breath, or dizziness. A sudden drop or rise also warrants medical evaluation. Causes range from iron deficiency to chronic disease or blood loss. Important: self-testing without clinical interpretation can lead to misinterpretation. The evidence for these ranges is strong (clinical guidelines), but the context lacks specific sources, so evidence is rated as 'mixed'.