wieviel eisen bei haarausfall — when to see a doctor?

The question about iron dosage for hair loss is not directly addressed in the provided knowledge context. In general medical practice, iron deficiency (e.g., ferritin <30 ng/mL) can contribute to telogen effluvium, but supplementation without lab testing is not recommended and can be harmful (iron overload, oxidative stress). The evidence for a specific iron dose for hair loss is weak and not supported by the sources here. A doctor should be consulted if hair loss is sudden, accompanied by fatigue or pallor, or if iron supplementation is considered – ferritin, serum iron, and transferrin saturation should be measured first. Without confirmed deficiency, iron is unlikely to help. Caveat: No direct studies in the knowledge base; answer reflects general clinical practice.