PUFA and oxFA levels showing >1.5 or 0.67-fold changes and p<0.01 values between plasma and serum samples of either male or female subjects.

(MFC (S/P), median fold change in serum/plasma; YM, young male, YF, young female; EM, elderly male; EF, elderly female; HHT, hydroxyheptadecatrienoic acid; HETE, hydroxyeicosatetraenoic acid; diHETE, dihydroxyeicosatetraenoic acid; diHETrE, dihydroxyeicosatrienoic acid; HEPE, hydroxyeicosapentaenoic acid; HDoHE, hydroxydocosahexaenoic acid).Statistical significance was determined by Wilcoxon matched-pairs signed-rank test (*ppp