Table 2 Concentrations of metabolites in human cerebrospinal fluid samples

1,5-Anhydrosorbitol^a

2-Hydroxybutyric acid^{a, b}

2-Hydroxyisovaleric acid^a

2-Oxoglutaric acid^a

2-Oxoisovaleric acid^a

3-Hydroxybutyric acid^a

3-Hydroxyisobutyric acid^a

3-Hydroxyisovaleric acid^a

Acetaminophen^a

Acetic acid^a

Acetoacetic acid^a

Acetone^a

L-Alanine^a

Choline^a

Citric acid^a

Creatine^a

Creatinine^a

Dimethylsulfone^a

Dimethylamine^a

Formic acid^a

D-Fructose^a

D-Glucose^{a, c}

L-Glutamic acid^a

L-Glutamine^{a, c}

Glycerol^{a, b}

L-Histidine^{a, c}

L-Isoleucine^a

Isopropyl alcohol^a

Lactic acid^a

L-Leucine^a

L-Lysine^a

D-Mannose^a

Methanol^a

L-Methionine^{a, c}

Myo-inositol^a

Oxalacetic acid^a

L-Phenyalanine^{a, c}

Propylene glycol^a

Pyroglutamic acid^a

Pyruvic acid^a

L-Serine^{a, c}

L-Threonine^{a, c}

L-Tryptophan^{a, c}

L-Tyrosine^a

L-Valine^a

Xanthine^a

4-Aminobutyric acid^b

Adenosine^b

Ascorbic acid^b

L-Asparagine^b

L-Aspartic acid^b

D-Galactose^b

Mannitol^b

Ribitol^b

Succinic acid^{a, b}

Thymine^b

Urea^b

Uric acid^b

DL-carnitine^c

Acetyl-L-carnitine^c

Propionyl-L-carnitine^c

Hydroxypropionylcarnitine^c

Butyryl-L-carnitine^c

Valeryl-L-carnitine^c

Glycine^{b, c}

L-Arginine^c

L-Ornithine^c

L-Proline^c

SM (OH) C14:1^c

SM (OH) C16:1^c

SM (OH) C22:1^c

SM (OH) C22:2^c

SM (OH) C24:1^c

SM C16:0^c

SM C16:1^c

SM C18:0^c

SM C18:1^c

SM C20:2^c

SM C24:0^c

SM C24:1^c

SM C26:0^c

SM C26:1^c

PC aa C30:0^c

PC aa C30:2^c

PC aa C32:0^c

PC aa C32:1^c

PC aa C32:2^c

PC aa C34:1^c

PC aa C34:2^c

PC aa C34:3^c

PC aa C36:1^c

PC aa C36:2^c

PC aa C36:3^c

PC aa C36:4^c

PC aa C36:5^c

PC aa C38:1^c

PC aa C38:3^c

PC aa C38:4^c

PC aa C38:5^c

PC aa C38:6^c

PC aa C40:3^c

PC aa C40:4^c

PC aa C40:5^c

PC aa C42:4^c

PC ae C32:1^c

PC ae C34:0^c

PC ae C34:1^c

PC ae C34:2^c

PC ae C34:3^c

PC ae C36:1^c

PC ae C36:2^c

PC ae C36:3^c

PC ae C36:4^c

PC ae C36:5^c

PC ae C38:1^c

PC ae C38:2^c

PC ae C38:3^c

PC ae C38:4^c

PC ae C38:5^c

PC ae C38:6^c

PC ae C40:5^c

PC ae C40:6^c

PC ae C44:4^c

PC ae C44:5^c

lysoPC a C18:0^c

lysoPC a C20:4^c