In daily life, people often ask whether hair loss is caused by stress, diet, or genetics. In reality, multiple factors interact: androgenetic alopecia (pattern baldness) is the most common form, but nutrient deficiencies (iron, zinc, vitamin D), thyroid disorders, or hormonal changes can also contribute. Stress and poor sleep often worsen temporary hair loss (telogen effluvium). Many turn to supplements or special shampoos, but the evidence for most of these is weak or purely marketing-driven. A DNA test can show certain risk variants (e.g., in the AR gene), but its predictive power is limited because lifestyle and environment play a larger role. Sudden or patchy hair loss should be evaluated by a doctor to rule out autoimmune conditions (alopecia areata) or other medical causes. In everyday life, a balanced diet, stress management, and gentle hair care are helpful. Consumer tests offer hints but do not replace a medical diagnosis.
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