Ornithine

ChemistryAlso known as: L-OrnithineAlso known as: OrnN/A

Measures the level of ornithine, an amino acid involved in nitrogen metabolism, in the blood.

Normal Range
Consult your provider
N/A
Abnormal Levels
Consult your provider
Specimen Type
Blood

Why This Biomarker Matters

Ornithine levels help detect inherited metabolic disorders affecting the urea cycle. Abnormal results can indicate the need for specialized dietary or medical management to prevent serious complications.

Overview

Ornithine is an amino acid involved in the urea cycle, which helps your body process and eliminate nitrogen waste. Measuring ornithine levels in blood helps assess amino acid metabolism and can identify rare genetic metabolic disorders. Abnormally high ornithine levels may indicate urea cycle disorders or other metabolic conditions, while very low levels are uncommon but can signal specific genetic defects. This test is typically ordered when metabolic or genetic screening is warranted.

Technical Information (LOINC Codes)

Standardized laboratory codes for this biomarker

2678-1Primary
Ornithine [Presence] in Serum or Plasma
27292-2
Ornithine [Moles/volume] in Urine
nmol/mL
47714-1
Ornithine [Moles/volume] in DBS
umol/L
2679-9
Ornithine [Mass/volume] in Serum or Plasma
mg/dL
25491-2
Ornithine [Moles/time] in 24 hour Urine
mmol/(24.h)
22725-6
Ornithine [Moles/volume] in Specimen
umol/L
22647-2
Ornithine [Moles/volume] in Cerebral spinal fluid
umol/L
20652-4
Ornithine [Moles/volume] in Serum or Plasma
umol/L
2681-5
Ornithine [Mass/time] in 24 hour Urine
mg/(24.h)
27219-5
Ornithine [Moles/volume] in Amniotic fluid
umol/dL
17389-8
Ornithine [Presence] in Urine
32260-2
Ornithine [Moles/volume] in Body fluid
umol/L
32261-0
Ornithine [Moles/volume] in Vitreous fluid
umol/L
40829-4
Ornithine [Presence] in Blood
13408-0
Ornithine [Mass/volume] in Amniotic fluid
mg/dL
25965-5
Ornithine [Moles/volume] in 24 hour Urine
mmol/L
13379-3
Ornithine [Mass/volume] in Cerebral spinal fluid
mg/dL
2680-7
Ornithine [Mass/volume] in Urine
mg/dL

Available Lab Tests

Order tests that measure this biomarker

Amino Acids (Plasma)

$193.00
Results in 3-7 business days