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Myristate and Creatinine, Urine/Stool

Published: August 9, 2026Updated: August 16, 2026

Measures myristate, a fatty acid, with creatinine in a urine and/or stool sample to help evaluate fatty-acid metabolism or intestinal absorption.

Quick summary

["This specialized test can help identify changes in myristate levels that may relate to fat metabolism, absorption, or urine concentration."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
47783-6
Short code
Myristate/Creat Ur-sRto
Synonyms
Myristate/Creat Ur-sRto
Category
kidney
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

What is this test?

This test measures myristate, a fatty acid, and creatinine in a urine and/or stool sample. Creatinine may help account for differences in urine concentration, while myristate measurement can provide information about fatty-acid metabolism or absorption.

Why might I need this test?

A clinician may order this test when symptoms suggest a problem with fat digestion, intestinal absorption, or fatty-acid metabolism. It may also be used during the evaluation of certain rare inherited metabolic disorders.

How is the test performed?

A urine sample, a stool sample, or both may be collected into the containers supplied by the laboratory. If a timed collection is requested, all urine or stool collected during the specified period must be submitted. The laboratory measures myristate and creatinine using validated analytical methods.

How do I prepare for the test?

Follow the laboratory's collection instructions and tell the healthcare team about medicines, supplements, and major dietary changes. For a urine collection, provide a clean-catch specimen as directed; for stool, use the provided container and avoid contaminating it with urine, water, or toilet paper.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Myristate and creatinine, urine/stool

Frequently asked questions

What does a high myristate result mean?
It may indicate increased fatty-acid intake, altered fat metabolism, or reduced absorption, depending on the specimen and clinical context. Your healthcare professional should interpret the result with your symptoms, diet, medicines, and other laboratory findings.
Why is creatinine measured with myristate?
Creatinine can help show how concentrated a urine sample is, which helps clinicians interpret the myristate measurement. Interpretation of creatinine measured in stool depends on the laboratory's method and specimen instructions.
Do I need to fast before this test?
Fasting is not routinely required unless the ordering clinician or laboratory specifically instructs you to fast. Dietary fat intake can affect results, so report any major dietary changes or restrictions.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

Medical Disclaimer

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