It was stated that the AHR, EPHX1, GSTP1, and SLC25A32 did not correlate in healthy intestinal tissue whereas AHCY, ALDH1A1, NNMT, GSTM4, UGT2B17, and SLCO1B3 did not correlate in CRC. This evidence concerns the gene GSTP1 and colorectal carcinoma.