Therefore, this study aimed to investigate the possible association of the plasma N-glycan levels in patients with PTSD and in control participants, with four polymorphisms related to the FUT8 gene region (rs6573604, rs11621121, rs10483776, and rs4073416), which have shown a high genome-wide significance in glycosylation during previous GWA studies. The gene discussed is FUT8; the disease is post-traumatic stress disorder.