Tyrosine in Urine (24-Hour Collection)
This test measures the amount of tyrosine, an amino acid, found in your urine over a 24-hour period. It may be used to assess kidney function or metabolic conditions.
["This test helps evaluate how well your kidneys filter waste products, including amino acids like tyrosine."]
Key facts at a glance
- LOINC
- 5815-6
- Short code
- Tyrosine Cry UrnS Ql Micro
- Synonyms
- Tyrosine Cry UrnS Ql Micro
- Category
- chemistry
- Sample
- urine
- Container
- Sterile urine container
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- microscopy-light
- Specimen volume
- 10 mL
- Stability
- Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
Why This Test Might Be Ordered
Your healthcare provider may recommend this test if you have symptoms or conditions that could affect how your body processes amino acids, such as kidney disease, metabolic disorders, or certain genetic conditions. It may also be used to monitor long-term kidney function or metabolic health.
What to Expect Before the Test
For a 24-hour urine collection, you’ll need to collect all urine for a full day, typically starting after a morning void. Follow your doctor’s instructions carefully to ensure accurate results. You may need to use special containers and keep the sample refrigerated until you return it.
What Happens During the Test
No special preparation is needed beyond the 24-hour urine collection. The collected urine is sent to a lab, where it is analyzed to determine the amount of tyrosine present. The results are compared to reference ranges to help diagnose or monitor conditions.
What the Results Mean
Results may be reported as a total amount of tyrosine excreted in urine over 24 hours. Abnormal results could indicate issues with amino acid metabolism, kidney function, or other metabolic disorders. Your doctor will interpret the results in the context of your overall health.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Frequently asked questions
How is this test different from a routine blood test for tyrosine?
What conditions might lead to abnormal tyrosine levels in urine?
Do I need to follow any special diet during the 24-hour urine collection?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy