wann hört haarausfall nach eisenmangel auf — what are common causes?

Hair loss due to iron deficiency (telogen effluvium) typically stops once iron stores are replenished. This can take 3–6 months after starting oral iron supplementation, provided the deficiency is corrected and no other causes are present. Key is to raise ferritin (storage iron) to at least 30–50 ng/ml, not just hemoglobin. Common causes of hair loss include iron deficiency, thyroid disorders (hypo- or hyperthyroidism), hormonal changes (postpartum, menopause), stress, crash diets, genetic alopecia (androgenetic alopecia), and deficiencies in zinc, vitamin D, or B12. Evidence for iron deficiency as a trigger is human-observational but well-established in practice. Caveat: A DTC test for iron status can be helpful but does not replace medical evaluation for persistent hair loss. If no improvement after 6 months, further diagnostic workup is warranted.