Wu et al. found that the GSTP1 rs1695 (A > G), rs4891 (T > C), and CAT rs7943316 (A > T) variants each increased asthma risk across heterozygous, dominant, and allelic models, whereas the CAT rs769217 (C > T) allele was protective against childhood asthma. Here, GSTP1 is linked to asthma.