Figure 1. Typical ¹H-NMR spectrum of plasma of psychological suboptimal human subject.

The key identified metabolites: 1, 2-OH-butyrate; 2, 3-OH-butyrate; 3, Acetate; 4, Acetoacetate; 5, Alanine; 6, Betaine; 7, Carnitine; 8, Choline; 9, Citrate; 10, Creatine; 11, Cysteine; 12, Glutamine; 13, Glutamate; 14, Glycine; 15, Glycerol; 16, Histidine; 17, Isoleucine; 18, Lactate; 19, Leucine; 20, Lipids; 21, Methionine; 22, Methylamine; 23, Methanol; 24, N-acetyl-glycoproteins; 25, Phosphatidylcholine; 26, Phenylalanine; 27, Proline; 28, Pyruvate; 29, Trimethylamine oxide; 30, Tyrosine; 31, Valine; 32, Glucose.