Table 2.

Mean values of serum metabolites in ASD patients.

Metabolite	Mean value ± standard deviation	Reference range
Aminobutyrate (µm/l)	21.1 ± 6.2	10–40
Ceruplasmin (mg/dl)	26.5 ± 5.3	20–60
Copper (µg/dl)	84.6 ± 15.8	80–180
Creatinine (µm/l)	60 ± 19	16–93
Glycine (µm/l)	270 ± 47.6	120–340
Homocysteine (µm/l)	10.9 ± 7.8	4–13
Isoleucine (µm/l)	63.5 ± 13.7	30–100
Lactate (µm/l)	1.5 ± 1.0	0.60–2.30
Leucine (µm/l)	127.6 ± 23	50–130
Methionine (µm/l)	24.2 ± 6.2	10–50
Phenylalanine (µm/l)	53.5 ± 10.3	30–80
Serine (µm/l)	145 ± 19.4	35–190
Tryptophan (µm/l)	13.2 ± 4.8	5–40
Valine (µm/l)	257 ± 51	150–320