GSTM1 and anemia (phenotype): After adjusting for variables with <i>P</i> < 0.10 in the univariate analysis (anemia severity, pre-treatment Hb, pre-treatment MCV) by incorporating them into a multivariate logistic regression model, none of the variables showed independent predictive value (<i>P</i> > 0.05).<h4>Conclusion</h4>These results provide preliminary evidence that adding Guipiheji (Guipi Mixture) to ferrous succinate tablets is more effective in treating IDA.