Tyrosine

ChemistryAlso known as: L-TyrosineAlso known as: 4-HydroxyphenylalanineAlso known as: Para-hydroxyphenylalaninemg/dL

Measures the amount of tyrosine excreted in serum or plasma.

Normal Range
0.5 – 2 mg/dL
mg/dL
Abnormal Levels
Consult your provider
Specimen Type
Blood

Why This Biomarker Matters

Abnormal urinary tyrosine may indicate kidney disease, metabolic disorders, or nutritional problems. Testing helps assess amino acid metabolism and kidney function.

Understanding Your Results

Normal Range

0.5 – 2 mg/dL

Overview

Tyrosine is a non-essential amino acid your body can produce from the amino acid phenylalanine. A urine tyrosine test measures how much is being excreted, reflecting protein metabolism and kidney function. Elevated urinary tyrosine may indicate excessive protein intake, kidney disease, or rare metabolic disorders like tyrosinemia. Low levels may suggest nutritional deficiency or malabsorption. This test helps assess amino acid metabolism and protein status.

Research & Evidence

100 publications

Sort:
Pirtobrutinib, a highly selective, noncovalent (reversible) BTKi in R/R marginal zone lymphoma: phase 1/2 BRUIN study.
Blood Adv · 2026
PMID: 41544219Other
Transarterial Chemoembolization Combined With Camrelizumab and Rivoceranib for Unresectable Hepatocellular Carcinoma (CHANCE2005/CARES-005): A Randomized Phase II Trial.
J Clin Oncol · 2026
PMID: 41734362
The safety and efficacy of in situ vaccine FOLactis for advanced hepatic malignancies.
Vaccine · 2026
PMID: 41762827
Phase Ia/Ib trial of the safety and efficacy of mobocertinib in combination with T-DM1 for patients with HER2-mutant solid tumors (WJOG16022M).
Eur J Cancer · 2026
PMID: 41903301
Hand-foot skin reaction as a positive prognostic factor in vascular endothelial growth factor receptor-tyrosine kinase inhibitor treatment.
Br J Pharmacol · 2026
PMID: 41967859
Surgical management of concomitant lung cancer and cardiovascular diseases: a multidisciplinary perspective.
Lung Cancer Manag · 2026
PMID: 41945887
Structural elucidation and thermal behavior of l-tyrosine hydroiodide: Hirshfeld surface analysis, halogen-dependent stability, and vibrational dynamics.
Spectrochim Acta A Mol Biomol Spectrosc · 2026
PMID: 41865633
Unclear territory: navigating metastatic nonclear cell renal cell carcinoma.
Curr Opin Oncol · 2026
PMID: 41874435
Deubiquitination-driven adaptive programs in hepatocellular carcinoma: The emerging role of USP22 in hypoxia, metabolic rewiring, and drug resistance.
Gene · 2026
PMID: 41856215
Cost-effectiveness analysis of tepotinib vs capmatinib as subsequent therapy in MET exon 14-mutated non-small-cell lung cancer.
Lung Cancer Manag · 2026
PMID: 41934258

Research data from MEDLINE/PubMed · 100 articles

Technical Information (LOINC Codes)

Standardized laboratory codes for this biomarker

20660-7Primary
Tyrosine [Moles/volume] in Serum or Plasma
umol/L
35571-9
Tyrosine [Moles/volume] in DBS
umol/L
3080-9
Tyrosine [Mass/volume] in Urine
mg/dL
45032-0
Tyrosine [Mass/volume] in DBS
mg/dL
3081-7
Tyrosine [Mass/time] in 24 hour Urine
mg/(24.h)
26966-2
Tyrosine [Moles/volume] in Urine
nmol/mL
3078-3
Tyrosine [Presence] in Serum or Plasma
13901-4
Tyrosine [Presence] in Urine
3079-1
Tyrosine [Mass/volume] in Serum or Plasma
mg/dL
25547-1
Tyrosine [Moles/time] in 24 hour Urine
mmol/(24.h)
22642-3
Tyrosine [Moles/volume] in Cerebral spinal fluid
umol/L
30069-9
Tyrosine [Moles/volume] in Amniotic fluid
umol/dL
3077-5
Tyrosine [Mass/volume] in Blood
mg/dL
101539-5
Tyrosine [Interpretation] in Plasma
25995-2
Tyrosine [Moles/volume] in 24 hour Urine
mmol/L
17754-3
Tyrosine [Presence] in Blood
22739-7
Tyrosine [Moles/volume] in Specimen
umol/L
32276-8
Tyrosine [Moles/volume] in Vitreous fluid
umol/L
32277-6
Tyrosine [Moles/volume] in Body fluid
umol/L
13417-1
Tyrosine [Mass/volume] in Amniotic fluid
mg/dL
13381-9
Tyrosine [Mass/volume] in Cerebral spinal fluid
mg/dL

Available Lab Tests

Order tests that measure this biomarker

Amino Acids (Plasma)

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