Urine Amino Acid Reference Intervals
| Analyte | 0-7 d (µmol/g cr) | 8-30 d (µmol/g cr) | 31 d-1 y (µmol/g cr) | 2-11 y (µmol/g cr) | 12-17 y (µmol/g cr) | >17 y (µmol/g cr) |
|---|---|---|---|---|---|---|
| Alanine(α-alanine) | 458.2-3784.3 | 779.7-3784.3 | 419.1-3133.1 | 167.1-1869.3 | 110.4-693.8 | 77.9-1337.0 |
| β-Alanine | 1.0-1318.6 | 1.0-1318.6 | 1.0-1158.1 | 1.0-128.2 | 1.0-810.0 | 1.0-869.8 |
| Alloisoleucine | 0.1-35.0 | 0.1-35.0 | 0.1-40.1 | 0.1-17.3 | 0.1-8.0 | 0.1-13.5 |
| α-Aminoadipate | 0.5-299.7 | 0.5-299.7 | 0.5-403.1 | 0.5-211.1 | 0.5-167.0 | 0.5-146.7 |
| γ-Aminobutyrate | 0.5-22.2 | 0.5-22.2 | 0.5-73.0 | 0.5-10.2 | 0.5-22.7 | 0.5-13.1 |
| β-Aminoisobutyrate | 0.5-1230.4 | 0.5-1230.4 | 0.5-2160.7 | 0.5-1325.7 | 0.5-453.9 | 0.5-807.9 |
| α-Aminobutyrate | 1.0-110.5 | 1.0-110.5 | 1.0-85.0 | 1.0-45.2 | 1.0-76.4 | 1.0-34.6 |
| Arginine | 5.0-105.8 | 5.0-105.8 | 5.0-259.8 | 5.0-69.4 | 5.0-107.7 | 5.0-69.6 |
| Argininosuccinate | 0.1-85.4 | 0.1-85.4 | 0.1-74.8 | 0.1-74.7 | 0.1-173.1 | 0.1-51.2 |
| Asparagine | 68.9-2100.3 | 88.3-2100.3 | 101.8-1328.9 | 55.7-687.8 | 33.2-913.9 | 25.4-454.2 |
| Aspartate | 1.0-62.0 | 1.0-62.0 | 1.0-223.6 | 1.0-39.1 | 1.0-40.9 | 1.0-86.7 |
| Citrulline | 1.0-55.1 | 1.0-55.1 | 1.0-56.1 | 1.0-23.2 | 1.0-27.4 | 1.0-27.4 |
| Cystathionine | 0.5-297.4 | 0.5-297.4 | 0.5-164.2 | 0.5-42.5 | 0.5-82.6 | 0.5-80.8 |
| Cystine | 0.3-532.8 | 0.3-532.8 | 0.3-300.0 | 0.3-141.4 | 0.3-337.6 | 0.3-223.8 |
| Glutamate | 5.0-565.2 | 5.0-565.2 | 5.0-212.6 | 5.0-92.4 | 5.0-49.6 | 5.0-92.4 |
| Glutamine | 5.0-2253.0 | 5.0-3151.6 | 5.0-4544.3 | 5.0-1920.6 | 5.0-822.0 | 5.0-1756.2 |
| Glycine | 3311.7-15087.9 | 4567.4-15087.9 | 1284.4-17135.0 | 616.7-8319.0 | 465.4-6346.3 | 277.3-7996.9 |
| Histidine | 399.3-3394.5 | 594.6-3147.5 | 650.5-5923.6 | 386.9-2982.9 | 223.0-5280.3 | 106.4-2534.2 |
| Homocitrulline | 0.5-347.7 | 0.5-347.7 | 0.5-189.4 | 0.5-103.7 | 0.5-123.4 | 0.5-80.0 |
| Homocystine | 0.3-1.7 | 0.3-3.6 | 0.3-3.8 | 0.3-2.4 | 0.3-2.4 | 0.3-1.4 |
| Hydroxylysine | 0.1-155.5 | 0.1-155.5 | 0.1-132.5 | 0.1-59.7 | 0.1-82.9 | 0.1-37.3 |
| Hydroxyproline | 0.5-4750.0 | 0.5-4750.0 | 0.5-1281.4 | 0.5-59.5 | 0.5-105.8 | 0.5-87.9 |
| Isoleucine | 5.0-88.6 | 5.0-88.6 | 5.0-115.4 | 5.0-46.4 | 5.0-78.9 | 5.0-48.1 |
| Leucine | 5.0-208.6 | 5.0-208.6 | 5.0-242.1 | 5.0-111.2 | 5.0-209.5 | 5.0-129.1 |
| Lysine | 93.5-4913.5 | 151.3-4913.5 | 59.7-929.0 | 35.8-562.2 | 21.4-824.0 | 15.3-1020.6 |
| Methionine | 1.0-118.9 | 1.0-118.9 | 1.0-59.7 | 1.0-32.2 | 1.0-66.4 | 1.0-37.1 |
| Ornithine | 5.0-558.2 | 5.0-558.2 | 5.0-115.4 | 5.0-66.6 | 5.0-112.6 | 5.0-76.3 |
| Phenylalanine | 5.0-229.9 | 5.0-229.9 | 5.0-433.4 | 5.0-202.8 | 5.0-450.6 | 5.0-239.0 |
| Proline | 5.0-4937.9 | 5.0-4937.9 | 5.0-1238.3 | 5.0-111.6 | 5.0-189.3 | 5.0-168.6 |
| Sarcosine | 0.5-188.7 | 0.5-188.7 | 0.5-193.5 | 0.5-34.2 | 0.5-51.4 | 0.5-27.3 |
| Serine | 837.1-3645.4 | 1199.7-4154.5 | 467.5-293.6 | 216.0-1385.5 | 125.0-2284.1 | 98.4-1052.8 |
| Taurine | 199.1-19952.1 | 238.8-19952.1 | 88.5-5941.6 | 75.2-3681.1 | 63.8-1868.7 | 24.2-5335.7 |
| Threonine | 5.0-2097.7 | 5.0-2093.8 | 5.0-1451.6 | 5.0-789.6 | 5.0-387.9 | 5.0-714.9 |
| Tryptophan | 1.0-385.4 | 1.0-385.4 | 1.0-391.6 | 1.0-210.9 | 1.0-106.0 | 1.0-207.5 |
| Tyrosine | 5.0-1071.9 | 5.0-1071.9 | 5.0-710.9 | 5.0-351.4 | 5.0-217.4 | 5.0-388.9 |
| Valine | 5.0-548.9 | 5.0-548.9 | 5.0-347.8 | 5.0-164.0 | 5.0-81.1 | 5.0-147.4 |