GSTM1 and anemia: As shown in Table 3, rats in PTG had an obvious normocytic normochromic anemia reflected by a significant (p < 0.05) reduction in red blood cells (RBCs), packed cell volume percent (PCV %), and hemoglobin concentration (Hb) by 29.68%, 29.23%, and 30.15%, respectively, compared to the control group.