The Urine Amino Acids profile aids in the identification of dietary protein adequacy and amino acid balance, gastrointestinal dysfunctions, vitamin and mineral deficiencies, and renal and hepatic dysfunction, among others. Urine amino acid analysis provides more information than plasma analysis regarding amino acid wasting and aberrant metabolism associated with co-factor insufficiencies. This is a 24-hour urine collection. It can also be ordered as a first-morning void collection.