wann hört haarausfall nach eisenmangel auf — can a DNA test help?

Hair loss due to iron deficiency typically stops weeks to months after iron stores are replenished (ferritin > 40–70 µg/l). A DNA test cannot diagnose iron deficiency – that requires blood tests (ferritin, transferrin saturation, hemoglobin). DNA tests can identify genetic variants in iron metabolism (e.g., TMPRSS6, HFE) that may affect iron absorption or distribution, but they do not replace medical evaluation. The evidence for a direct link between specific SNPs and hair loss in iron deficiency is weak to moderate. A genetic test might offer clues about a predisposition to low ferritin, but its clinical utility is limited. Without blood work and a doctor's assessment, a DNA test is not helpful for this question.