However, the laboratory analysis revealed lower Hb (139.17 ± 17.29 vs. 146.83 ± 15.16, P = 0.012) and higher hs-CRP levels (13.19 ± 35.65 vs. 1.20 ± 1.23, P = 0.012) in IBD patients. This evidence concerns the gene GSTM1 and inflammatory bowel disease.