Tyrosine concentration in serum/plasma
This test measures the amount of tyrosine, an essential amino acid, in your blood. Tyrosine is involved in the production of hormones like thyroid hormones and neurotransmitters.
["Tyrosine helps regulate important bodily functions, and levels can be checked for certain health evaluations."]
Key facts at a glance
- LOINC
- 47792-7
- Short code
- Tyrosine SFr Hair
- Synonyms
- Tyrosine SFr Hair
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
Why Is This Test Done?
Your healthcare provider may order this test if you have symptoms related to amino acid metabolism disorders, thyroid issues, or if you need to monitor conditions like phenylketonuria (PKU) or other genetic disorders affecting amino acid processing. It may also be part of routine metabolic screening or research studies.
What to Expect Before the Test
No special preparation is usually required. You may be asked to fast for a certain period before the blood draw, depending on your provider’s instructions. Bring any medications you’re currently taking to your appointment.
What Happens During the Test?
A healthcare professional will draw blood from a vein in your arm. The process is quick and typically painless. The blood sample is then sent to a lab for analysis using a specialized method to measure tyrosine concentration.
What Are Possible Results?
Results will be reported as a concentration value of tyrosine in your blood. Your healthcare provider will compare this value to standard reference ranges and discuss any findings with you.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Abnormal tyrosine levels can indicate underlying metabolic disorders, thyroid dysfunction, or other conditions affecting amino acid metabolism. High levels might suggest issues with tyrosine breakdown, while low levels could point to deficiencies or genetic disorders. Always consult your healthcare provider for interpretation of your specific results.
Short name
Tyrosine Level
Frequently asked questions
What causes abnormal tyrosine levels?
How are tyrosine levels typically monitored?
Can diet affect tyrosine levels?
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