There was no evidence of publication bias for GSTM1 (P = 0.223, S1 Fig), GSTT1 (P = 0.079, S2 Fig), and GSTP1 IIe105Val (Val/Val vs. IIe/IIe: P = 0.884, IIe/Val vs. IIe/IIe: P = 0.153; Val/Val vs. IIe/IIe +IIe/Val: P = 0.596; Val vs. IIe: P = 0.505; Val/Val + IIe/Val vs. IIe/IIe: P = 0.478, S3–S7 Figs) on BC risk. This evidence concerns the gene GSTM1 and breast cancer.