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

Note: all measurements in micro mole per liter (micro mol/L). The normal range of values may vary between different laboratories.

What abnormal results mean:

An increase in the total level of amino acids in the blood amino may be due to:

• Eclampsia
• Fructose intolerance
• Ketoacidosis (from diabetes)
• Kidney failure
• Reye syndrome

A decrease in the total level of amino acids in the blood may be due to:

• Adrenal cortical hyperfunction
• Fever
• Hartnup disease
• Huntington's chorea
• Malnutrition
• Nephrotic syndrome
• Phlebotomus fever
• Rheumatoid arthritis