wann hört haarausfall nach eisenmangel auf — which blood markers matter?

Hair loss due to iron deficiency (telogen effluvium) typically improves 3–6 months after iron stores are replenished. The key marker is ferritin (storage iron), not just hemoglobin. Ferritin below 30–40 ng/mL is considered a risk factor; many experts target >70 ng/mL for optimal hair regrowth. Other relevant blood markers: hemoglobin, MCV (mean corpuscular volume), transferrin saturation, and soluble transferrin receptor (sTfR) – these help detect functional iron deficiency. Even after correction, hair shedding may continue for weeks because the hair cycle responds slowly. A drop in ferritin or insufficient rise indicates ongoing deficiency. Caveat: MyBody-X tests can measure iron markers but do not diagnose hair loss. Other causes (thyroid, hormones, stress) must be evaluated by a physician. Evidence for the iron–hair loss link is human-strong (clinical studies), but no specific PMIDs are provided in the given context.