Hishida et al19 have conducted a cross‐sectional data cohort study of polymorphisms of antioxidant enzymes (SOD2, CAT, GPx, TXNRD, SEPP1, SEP15, and SEPS1) in chronic kidney disease patients (CKD) from numerous Japanese institutions, revealing that only CAT C‐262T is correlated with the risk of CKD. This evidence concerns the gene SOD2 and chronic kidney disease.