GSTM1 deletion is known to be protective for lung cancer among individuals with a high intake of cruciferous vegetable and deleterious among those with low intake of cruciferous vegetable (London et al., 2000; Zhao et al., 2001; Wang et al., 2004; Brennan et al., 2005; Carpenter et al., 2009). Here, GSTM1 is linked to lung carcinoma.