GSTM1 and anemia (phenotype): Anemia, identified by decreased red blood cell count is pathophysiologically multifactorial [1, 2].The World Health Organization (WHO) defines anemia as a hemoglobin (Hb) value below 13 g/dL in men over 15 years of age, below 12 g/dL in non-pregnant women over 15 years, and below 11 g/dL in pregnant women [3].