Amino acids - urine; Urine amino acids
Aminoaciduria is an abnormal amount of amino acids in the urine. Amino acids are the building blocks for proteins in the body.
A clean-catch urine sample is needed. This is often done at your doctor's office or health clinic.
Most of the time you do not need to take special steps before this test. Make sure your doctor knows all of the medicines you recently used. If this test is being done on an infant who is breast-feeding, make sure the health care provider knows what medicines the nursing mother is taking.
The test involves only normal urination.
This test is done to measure amino acid levels in the urine. There are many different types of amino acids. It is common for some of each kind to be found in the urine. Increased levels of individual amino acids can be a sign of a problem with metabolism.
The specific value is measured in micromoles per deciliter (micromol/dL).
Normal value ranges may vary slightly among different laboratories. Talk to your health care provider about the meaning of your specific test results.
The examples above show the common measurements for results for these tests. Some laboratories use different measurements or may test different specimens.
Increased total urine amino acids may be due to:
Screening infants for increased levels of amino acids can help detect problems with metabolism. Early treatment for these conditions may prevent complications in the future.
Hortin GL. In: Burtis CA ed. Amino Acids, Peptides, and Proteins. Tietz Textbook of Clinical Chemistry and Molecular Diagnostics. 5th ed. Philadelphia, PA: Elsevier Saunders; 2012:chap 21.BACK TO TOP
Review Date: 4/20/2015
Reviewed By: Chad Haldeman-Englert, MD, FACMG, Wake Forest School of Medicine, Department of Pediatrics, Section on Medical Genetics, Winston-Salem, NC. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.
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