GSTM1 and anemia (phenotype): Hb levels were significantly reduced in women with hair loss (11.45 ± 0.39 g/dL) compared to controls (13.09 ± 0.46 g/dL) (Table 2), the mean Hb in hair loss patients (11.45 g/dL) was slightly below the lower reference limit, consistent with borderline anemia, while controls remained within normal.