Nevertheless, a significant association of alcohol consumption reported as migraine trigger with the presence of the variant allele haplotype of GSTP1 rs1695 and rs1138272 [Val105/Val114 or Grs1695T rs1138272 (GSTP1*C) haplotype] was revealed in the migraine cohort of the current study. This evidence concerns the gene GSTP1 and migraine disorder.