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Urine Amino Acid Panel

The Amino Acid Profile Urine Test measures the levels of 36 amino acids in a urine sample. It is used to detect excess amino acid excretion and to support the evaluation of inherited metabolic and kidney-related conditions.

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Typical turnaround
1-3 business days
Starting price
From $299
Results
Confidential, online

Quick answer

The Amino Acid Profile Urine Test is a panel that measures the levels of individual amino acids excreted in urine. Because the kidneys filter amino acids and return most of them to the blood, unusual amounts in urine can signal a transport problem, an inherited metabolic condition, or another underlying issue. The test requires a urine collection, and results are interpreted by a qualified healthcare provider alongside other findings.

What this test measures

Amino acids are filtered by the kidneys and mostly reabsorbed into the bloodstream. When a reabsorption pathway is impaired, or when amino acid levels in the blood are unusually high, larger amounts can spill into the urine. A urine amino acid profile measures these amounts to help identify the underlying pattern.

The panel reports around 36 amino acids and related compounds, often including cystine, homocysteine, phenylalanine, tyrosine, and branched-chain amino acids such as leucine and valine. Collection instructions vary; some laboratories request a single random sample while others ask for a timed or first-morning collection. Follow the instructions provided with the order.

This test is often ordered when an inherited metabolic disorder is suspected, when blood amino acid results need confirmation, or when kidney transport problems are being evaluated. It may also be used to monitor a known condition. Results are interpreted together with blood testing, diet, medications, and clinical history by a qualified healthcare provider.

  • Alanine
  • Arginine
  • Citrulline
  • Cystine
  • Glutamine
  • Glycine
  • Homocysteine
  • Isoleucine
  • Leucine
  • Phenylalanine
  • Tyrosine
  • Valine

Why people order this test

  • Investigate suspected inherited amino acid transport or metabolism disorders
  • Follow up on abnormal blood amino acid results
  • Evaluate kidney-related amino acid loss
  • Monitor a known metabolic condition over time
  • Assess unusual urinary findings such as crystals or stones
  • Support nutritional and metabolic assessment with a clinician
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How to prepare

Follow the collection instructions provided with your order, which may specify a random, first-morning, or timed urine sample. Some laboratories request that certain foods or supplements be avoided beforehand, so read the instructions carefully. No blood draw is required for this test.

Understanding your results

Results are typically available within one to three business days. The report lists each amino acid with its value and a reference range, and the clinician looks for patterns rather than single values. A qualified healthcare provider can explain what the findings mean and whether blood testing or other follow-up is needed.

Urine Amino Acid Panel by state

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Frequently Asked Questions

Why test urine instead of blood for amino acids?

Urine shows how much the kidneys are excreting, which can reveal transport problems that blood testing alone may not show clearly.

What collection is needed?

Depending on the laboratory, you may provide a random sample, a first-morning sample, or a timed collection. The order instructions specify which one.

Do I need to fast?

Fasting is usually not required, but some laboratories ask for specific timing. Follow the written preparation instructions.

Can diet change the results?

Yes. Diet and supplements can affect amino acid levels in urine, so the results are interpreted alongside a full clinical picture.

Is this test suitable for children?

It can be used at any age when clinically indicated. Collection instructions differ for infants, so follow the laboratory's guidance.

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Every page on this site is reviewed for clarity, sourcing, and accuracy. We update our library as testing options, collection networks, and accreditation standards change.

Medical disclaimer. The information on LabOrdering.com is educational only and is not medical advice, diagnosis, or treatment. Reference ranges and clinical guidance vary between laboratories. Always consult a qualified healthcare provider about your own results and care.