Test directory: Very Long Chain Fatty Acids

Ordering Code 6666
Test Name Very Long Chain Fatty Acids
Alias Peroxisomal Disorders
VLCFA
Preferred Specimen Serum
Preferred Container Plain (Red)
Other Specimen/Container Plasma in EDTA, K2 (Lavender)
Optimum Volume 1 mL
Collection Instructions No alcohol consumption for 24 hours prior to draw
Overnight fast required for non-pediatric patients
For pediatric patients, collect prior to the next meal
Patient age and gender are required for reporting.
Transport Requirements Oahu: Refrigerated
Airline: Refrigerated
Specimen Stability Ambient: Not Stable
Refrigerated: 7 Days
Frozen: 28 Days
Rejection Criteria Hemolyzed, Lipemic, Serum Separator Tube (SST),
Non-fasting samples
Avail. Stat NO
Analytic Time Up to 2 Weeks
Methodology Liquid Chromatography, Mass Spectrometry (LC/MS)
Reference Lab  Quest Diagnostic Lab-NI

Reference range(s)

The reference ranges listed below are valid on this date of November 1, 2025.
Component Age Male Norm Male Critical Low Male Critical High Female Norm Female Critical High Female Critical Low Units Add'l info
Interpretation ALL See report.
Phytanic Acid ALL See report.
Pristanic Acid ALL See report.
Docosanoic Acid, C22 ALL See report.
Tetracosanoic Acid, C24 ALL See report.
Hexacosanoic Acid, C26 ALL See report.
Ratio C24/C22 ALL See report.
Ratio C26/C22 ALL See report.
Ratio Pristanic/Phytanic ALL See report.