Methionine

ChemistryAlso known as: L-MethionineAlso known as: 2-Amino-4-methylthiobutanoic acidmg/dL

Measures the amount of methionine excreted in serum or plasma.

Normal Range

0.1 – 0.5 mg/dL

mg/dL

Abnormal Levels

Consult your provider

Specimen Type

Blood

Why This Biomarker Matters

Abnormal methionine levels may indicate kidney disease, metabolic disorders, malnutrition, or liver dysfunction. Testing helps assess protein metabolism and nutritional status.

Understanding Your Results

Normal Range

0.1 – 0.5 mg/dL

Overview

Methionine is an essential amino acid obtained from dietary protein that plays a key role in protein synthesis and methylation reactions vital for cell function. A urine methionine test measures excretion levels, reflecting protein metabolism and kidney function. Elevated levels may indicate excessive protein intake, kidney disease, or metabolic disorders. Low levels may suggest nutritional deficiency, malabsorption, or liver disease. This test helps assess amino acid metabolism and nutritional status.

Technical Information (LOINC Codes)

Standardized laboratory codes for this biomarker

20651-6Primary

Methionine [Moles/volume] in Serum or Plasma

umol/L

2623-7

Methionine [Mass/volume] in Urine

mg/dL

26963-9

Methionine [Moles/volume] in Urine

nmol/mL

2621-1

Methionine [Presence] in Serum or Plasma

2624-5

Methionine [Mass/time] in 24 hour Urine

mg/(24.h)

47700-0

Methionine [Moles/volume] in DBS

umol/L

2622-9

Methionine [Mass/volume] in Serum or Plasma

mg/dL

25476-3

Methionine [Moles/time] in 24 hour Urine

umol/(24.h)

22716-5

Methionine [Moles/volume] in Specimen

umol/L

22648-0

Methionine [Moles/volume] in Cerebral spinal fluid

umol/L

55943-5

Methionine [Moles/mass] in Hair

umol/g

13376-9

Methionine [Mass/volume] in Cerebral spinal fluid

mg/dL

63380-0

Methionine [Presence] in DBS

13405-6

Methionine [Mass/volume] in Amniotic fluid

mg/dL

17264-3

Methionine [Presence] in Urine

25956-4

Methionine [Moles/volume] in 24 hour Urine

umol/L

2620-3

Methionine [Presence] in Blood

26844-1

Methionine [Moles/volume] in Amniotic fluid

umol/dL

27098-3

Methionine [Presence] in 24 hour Urine

32257-8

Methionine [Moles/volume] in Vitreous fluid

umol/L

32258-6

Methionine [Moles/volume] in Body fluid

umol/L

47199-5

Methionine [Mass] of Dose

Available Lab Tests

Order tests that measure this biomarker

Amino Acids (Plasma)

$193.00

Results in 3-7 business days