(A) PCA plots of data obtained from untargeted metabolomics analysis of plasma samples. Each sphere represents a single animal. Black spheres: low salt-fed group. Red spheres: high salt-fed group. Distinct clusters of black and red spheres indicate that the groups are dissimilar in their metabolomics profiles.
(B) Volcano plot of all detected metabolites by the untargeted GC-TOF-MS. Blue and red dots represent metabolites not significantly and significantly different between low and high salt-fed rats (p < 0.05, fold change [FC] >1.4). +, denotes βOHB.
(C) Plasma levels of βOHB.
(D) Confirmation of the decreased serum βOHB levels in fasting rats on a high salt diet. *p < 0.05, ns, not significant.