welche nährstoffe fehlen bei haarausfall — when to see a doctor?

Hair loss can be linked to nutrient deficiencies, but the evidence is mixed. Commonly discussed nutrients include iron, zinc, vitamin D, vitamin B12, biotin, and omega-3 fatty acids. Iron deficiency (especially in women with heavy menstruation) is associated with diffuse hair loss, as is zinc deficiency. Vitamin D deficiency has also been linked to hair loss, though study results are not conclusive. Biotin deficiency is rare but often marketed in supplements. Importantly, nutrient deficiency is only one possible cause. Hair loss can also result from hormonal imbalances (e.g., thyroid, androgens), stress, medications, or autoimmune conditions. You should see a doctor if hair loss is sudden, patchy, accompanied by scalp changes (redness, scaling), or if you have additional symptoms like fatigue, weight changes, or brittle nails. Also seek medical advice for persistent, unexplained hair loss. Blood tests can identify deficiencies, but self-supplementation without diagnosis is not recommended. Evidence for individual nutrients is mostly moderate, based on observational studies. Genetic factors also play a role. MyBody-X tests can analyze nutrient status and genetic predispositions but do not replace medical evaluation.