Biomarker Lens

Biomarkers · Chemical

Tryptophan

What it measures

Tests in the graph that measure it
5

A plain-language description with its source has not been added for this biomarker yet. What the laboratories say about the tests that measure it is below.

Tests that measure Tryptophan

Amino Acid Analysis LCMS Urine

Laboratory
Quest Diagnostics
Test code
36183
Specimen
Urine
Fasting
Not stated as required

What the laboratory says this test is for

Amino acid analysis is necessary for the diagnosis of a variety of inborn errors of metabolism. These include, but are not limited to, phenylketonuria, tyrosinemia, citrullinemia, non-ketotic hyperglycinemia, maple syrup urine disease, and homocystinuria. The assay is also key for the continued monitoring of treatment plans for these disorders and useful for assessing nutritional status of patients. Our methodology is highly accurate at very low levels as well as at elevated levels.

Quest Diagnostics test directory, test code 36183

Amino Acid Analysis LCMS CSF

Laboratory
Quest Diagnostics
Test code
29881
Specimen
Csf
Fasting
Not stated as required

What the laboratory says this test is for

Amino acid analysis is necessary for the diagnosis of a variety of inborn errors of metabolism. These include, but are not limited to, Phenylketonuria, Tyrosinemia, Citrullinemia, Non-Ketotic Hyperglycinemia, Maple Syrup Urine Disease, and Homocystinuria. The assay is also key for the continued monitoring of treatment plans for these disorders and useful for assessing nutritional status of patients. Our methodology is highly accurate at very low levels as well as at elevated levels.

Quest Diagnostics test directory, test code 29881

Tryptophan

Laboratory
Quest Diagnostics
Test code
959
Specimen
Plasma
Fasting
Required

Quest Diagnostics test directory, test code 959

Amino Acid Analysis Plasma

Laboratory
Quest Diagnostics
Test code
767
Specimen
Plasma
Fasting
Required

What the laboratory says this test is for

Amino Acid analysis is necessary for the diagnosis of a variety of inborn errors of metabolism. These include, but are not limited to, phenylketonuria, tyrosinemia, citrullinemia, non-ketotic hyperglycinemia, maple syrup urine disease, and homocystinuria. The assay is also key for the continued monitoring of treatment plans for these disorders and useful for assessing nutritional status of patients. Our methodology is highly accurate at very low levels as well as at elevated levels.

Quest Diagnostics test directory, test code 767

Amino Acid Analysis Limited Plasma

Laboratory
Quest Diagnostics
Test code
1776
Specimen
Plasma
Fasting
Required

Quest Diagnostics test directory, test code 1776

About this page

Everything above is drawn from the named sources and shown as they published it. Reference ranges belong to the laboratory that issued them and the population it named; they are not a universal normal. This page describes the biomarker in general and does not interpret anyone's result. For your own numbers, talk to a clinician, or use Aumnivida, which reads the same graph next to your records.

Found an error? Write to hello@biomarkerlens.com with the page link and the source that contradicts it.