Plasma amino acids

Injury	Disease	Nutrition	Poison

Symptoms	Surgery	Test	Special Topic

Amino acids

Overview

Risks

Results

Plasma amino acids

Alternative Names:

Amino acids - plasma
Normal Values:

Alanine
- Children: 200 to 450
- Adults: 230 to 510
Alpha-aminoadipic acid
- Children: not measured
- Adults: not measured
Alpha-amino-N-butyric acid
- Children: 8 to 37
- Adults: 15 to 41
Arginine
- Children: 44 to 120
- Adults: 13 to 64
Asparagine
- Children: 15 to 40
- Adults: 45 to 130
Aspartic acid
- Children: 0 to 26
- Adults: 0 to 6
Beta-alanine
- Children: 0 to 49
- Adults: 0 to 29
Beta-amino-isobutyric acid
- Children: not measured
- Adults: not measured
Carnosine
- Children: not measured
- Adults: not measured
Citrulline
- Children: 16 to 32
- Adults: 16 to 55
Cystine
- Children: 19 to 47
- Adults: 30 to 65
Glutamic acid
- Children: 32 to 140
- Adults: 18 to 98
Glutamine
- Children: 420 to 730
- Adults: 390 to 650
Glycine
- Children: 110 to 240
- Adults: 170 to 330
Histidine
- Children: 68 to 120
- Adults: 26 to 120
Hydroxyproline
- Children: 0 to 5
- Adults: not measured
Isoleucine
- Children: 37 to 140
- Adults: 42 to 100
Leucine
- Children: 70 to 170
- Adults: 66 to 170
Lysine
- Children: 120 to 290
- Adults: 150 to 220
Methionine
- Children: 13 to 30
- Adults: 16 to 30
1-methylhistidine
- Children: not measured
- Adults: not measured
3-methylhistidine
- Children: 0 to 52
- Adults: 0 to 64
Ornithine
- Children: 44 to 90
- Adults: 27 to 80
Phenylalanine
- Children: 26 to 86
- Adults: 41 to 68
Phosphoserine
- Children: 0 to 12
- Adults: 0 to 12
Phosphoethanolamine
- Children: 0 to 12
- Adults: 0 to 55
Proline
- Children: 130 to 290
- Adults: 110 to 360
Serine
- Children: 93 to 150
- Adults: 56 to 140
Taurine
- Children: 11 to 120
- Adults: 45 to 130
Threonine
- Children: 67 to 150
- Adults: 92 to 240
Tyrosine
- Children: 26 to 110
- Adults: 45 to 74
Valine
- Children: 160 to 350
- Adults: 150 to 310

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Note: all measurements in micro mole per liter (micro mol/L). The normal range of values may vary between different laboratories, and the laboratory performing the test should therefore be consulted in interpretation of the test result.

What abnormal results mean:

An elevated level of a particular amino acid is highly suggestive of an inherited defect in metabolism of that amino acid. The test for an individual amino acid may also be used for following the effectiveness of a particular treatment.

If the total amino acid level is elevated, several diseases or conditions may be the cause:

If the total amino level is decreased, the following conditions may be responsible: