Unit: nmol/mL (Plasma),
μmol/day (Urine) (however, urea [indicated by "2)"] is mmol/day.)
Amino Acid Name
Abbreviation
Reference Range
Plasma
Urine
Taurine
Tau
39.5-93.2
322.2-5214.5
Phosphoethanolamine 1)
PEA
31.0-110.0
Urea 1)
Urea
2) 130.3-493.2
Aspartic acid
Asp
2.4 or less
12.7 or less
Hydroxyproline
Hypro
21.6 or less
ND
Threonine
Thr
66.5-188.9
79.9-528.3
Serine
Ser
72.4-164.5
208.8-1020.0
Asparagine
Asn
44.7-96.8
60.7-372.3
Glutamic acid
Glu
12.6-62.5
11.3-42.7
Glutamine
Gln
422.1-703.8
207.0-1357.3
Sarcosine
Sarco
TR
99.0 or less
Alpha-Aminoadipic acid
Alpha-AAA
ND
16.7-118.6
Proline
Pro
77.8-272.7
ND
Glycine
Gly
151.0-351.0
652.1-3670.6
Alanine
Ala
208.7-522.7
141.2-833.9
Citrulline
Cit
17.1-42.6
13.5-55.6
Alpha-Aminobutyric acid
Alpha-ABA
7.9-26.6
27.1 or less
* Valine
Val
147.8-307.0
24.8-82.2
Cystine
Cys
13.7-28.3
23.7-170.9
Cystathionine
Cysthio
TR
TR-44.7
* Methionine
Met
18.9-40.5
TR-20.2
* Isoleucine
Ileu
43.0-112.8
7.5-23.5
* Leucine
Leu
76.6-171.3
24.6-89.3
* Tyrosine
Tyr
40.4-90.3
50.6-308.4
* Phenylalanine
Phe
42.6-75.7
27.2-110.2
Gamma-Amino-beta-hydroxybutyric acid
Gamma-A Beta-HBA
ND
ND
Beta-Alanine
Beta-Ala
TR
TR-153.0
Beta-Aminoisobutyric acid
Beta-AIBA
TR
TR-1623.9
Gamma-Aminobutyric acid
Gamma-ABA
ND
ND
Monoethanolamine 1)
MEA
10.4 or less
195.3-606.2
Homocystine
Homocys
ND
ND
* Histidine
His
59.0-92.0
436.4-2786.5
3-Methylhistidine
3-Me His
5.0 or less
113.4-480.9
1-Methylhistidine
1-Me His
18.5 or less
59.3-2816.2
Carnosine 1)
Carno
ND
87.6 or less
Anserine 1)
Ans
ND
231.4 or less
Tryptophan
Trp
37.0-74.9
20.7-150.7
Hydroxylysine
Hylys
ND
22.9 or less
Ornithine
Orni
31.3-104.7
6.9-43.9
* Lysine
Lys
108.7-242.2
51.6-1639.6
* Arginine
Arg
53.6-133.6
11.6-54.8
Total AA
(Total amino acid: Sum of non-essential amino acids + Sum of essential amino acids)
2068.2-3510.3
NEAA (Sum of non-essential amino acids)
1381.6-2379.4
EAA (Sum of essential amino acids)
660.0-1222.3
BCAA (Sum of branched-chain amino acids)
265.8-579.1
EAA/NEAA
(Sum of essential amino acids/Sum of non-essential amino acids)
0.40-0.63
BCAA/Total AA
(Sum of branched-chain amino acids/Total amino acid)
0.11-0.18
Fischer's ratio
2.43-4.40
Asterisks (*) indicate the amino acid names subjected to the amino acid analysis (9 types).
ND: Below the sensitivity of detection TR: Trace
Although the substances indicated by "1)" are not "amino acids",
we will include and measure them in this item.
No units for EAA/NEAA, BCAA/Total AA, and Fischer's ratio.