Concentrations of plasma metabolites regulated between 5-week-old pigs orally administered either vehicle (group CON) or pivalate (group PIV) for 28 days as identified by targeted plasma metabolomics. Bars are means ± SD for n = 6 pigs/group. Abbreviations: aa, acyl-acyl residue; ae, acyl-alkyl residue; C, carnitine; C0, free carnitine; C2, acetylcarnitine; C3, propionylcarnitine; C3-DC (C4-OH), malonylcarnitine (3-hydroxybutyrylcarnitine); C5, isovalerylcarnitine, valerylcarnitine, 2-methylbutyrylcarnitine and/or pivaloylcarnitine; DG, diacylglycerol; Cer, ceramide; PC, phosphatidylcholine; Hex3Cer, trihexosylceramide; TG, triacylglycerol species (with number of C-atoms and double bonds of one fatty acid and the sum of the number of C-atoms and double bonds of the other two fatty acids).