Amino Acids, Urine (24 hr)

1-Methylhistidine; 3-Methylhistidine; A-Amino-n-butyrate; A-Aminoadipate; Alanine; Ammonia; Anserine; Arginine; Asparagine; Aspartic Acid; B-Alanine; B-Aminoisobutyrate; Carnosine; Citrulline; Creatinine; Cystathionine; Cysteine; Cystine; Ethanolamine; G-Aminobutyrate; Glutamic Acid; Glutamine : Glutamate; Glutamine; Glycine; Histidine; Homocystine; Hydroxyproline; Isoleucine; Leucine; Lysine; Met Sulfoxide; Methionine; Ornithine; Phenylalanine; Phosphoethanolamine; Phosphoserine; Proline; Sarcosine; Serine; Taurine; Threonine; Tryptophan; Tyrosine; Urea; Valine

Urine

Amino acid (AA) analysis aids in the identification of dietary protein adequacy and amino acid balance, gastrointestinal dysfunctions, forms of protein intolerance, vitamin and mineral deficiencies, renal and hepatic dysfunction, psychiatric abnormalities, susceptibility to inflammatory response and oxidative stress, reduced detoxification capacity and many other inherent and acquired disorders in AA metabolism. Plasma is traditionally used to assess the status of essential AA while urine analysis provides more information regarding AA wasting and aberrant metabolism associated with co-factor insufficiencies.

The 24-hour urine amino acid analysis has the highest probability of detecting abnormalities if renal function is normal. The 24-hour test indicates what is high and low over the course of a day, reflects blood and tissue amino acid pools, and is not affected by circadian rhythm. Healthy kidneys efficiently conserve essential amino acids. Therefore, urine levels of amino acids decrease first and tend to give an earlier indication of inadequacy than do plasma levels.
A first morning void urine (FMV) amino acid analysis, with results normalized per gram creatinine, provides an alternative when a complete 24-hour collection is not a viable option. The FMV analysis is excellent for identification of marked abnormalities, particularly with respect to gastrointestinal health, inherited disorders in amino acid metabolism and renal function, and can be used for protein challenge testing.

Source: https://www.doctorsdata.com/urine-amino-acids/; Accessed 21-Oct-2016