For alcohol consumption, 12 articles (4238 cases and 5394 controls) were about the association between GSTM1 and cancers, 8 articles (2949 cases and 4025 controls) were about GSTT1 and cancers and 5 articles (1898 cases and 2527 controls) were about GSTP1 and cancer among drinkers. Here, GSTM1 is linked to cancer.