The aim of the project was to identify altered plasma proteins and altered plasma N-glycopeptides from monozygotic twin pairs who are discordant for body weight. We performed targeted quantitative N-glycoproteomics from plasma samples from 48 twin pairs (n = 96 individuals). This is the N-Glycopeptidomics part of the project. Proteomics of the same project has the accession number of PXD041384.