No Modifying Effect of NAT1, GSTM1, and GSTT1 on the Relation between Smoking and Colorectal Cancer Risk

Cigarette smoke contains potent carcinogenic compounds, including polycyclic aromatic hydrocarbons, heterocyclic amines, and nitrosamines. When entering the body, cigarette carcinogens have relatively weak mutagenic potential. After being metabolized, more potent mutagens are formed, which could