Figure 1: Spectral characteristics and metabolic content of a typical saliva 600 MHz 1H NMR spectrum of a patient with primary SjögrenĀ“s syndrome (red) and a healthy control (blue). FOR, formate; PHE, phenylalanine; HIS, histidine; TYR, tyrosine; GLY, glysine; MeOH, methanol; PRO proline; TAU, taurine; CHO, choline; CIT, citrate; SUC, succinate; PYR,pyruvic acid; ACE, acetate; ALA, alanine; LAC, lactate; EtOH, ethanol; Pr(OH)2, isopropanol; PrA, propanoic acid; BuA, butyric acid.