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Fatty Acid Metabolism Screening Test (via Serum)

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

This test measures levels of certain fatty acids in your blood, which can help assess how well your body is processing fats. It may be used to evaluate metabolic health or identify conditions affecting fat metabolism.

Quick summary

["This screening helps identify potential fatty acid metabolism issues that may require further medical evaluation."]

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

Key facts at a glance

LOINC
108656-0
Short code
FA Msmt Stl
Synonyms
FA Msmt Stl
Category
chemistry
Sample
stool
Container
Clean container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 g
Stability
Refrigerated: 24h, Frozen: 7d
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your doctor may recommend this test if you have symptoms like unexplained fatigue, muscle weakness, or unusual skin conditions. It could also be part of a broader evaluation for metabolic disorders, genetic testing, or monitoring certain medications that affect fat metabolism.

What to Expect Before the Test

No special preparation is typically needed, but you may be asked to fast for 8–12 hours before the blood draw if your doctor specifies it. Wear comfortable clothing and plan to rest for a short time afterward.

What Happens During the Test

A healthcare provider will collect a blood sample from a vein in your arm. You may feel a slight pinch, but the process is quick and usually painless. The sample will be sent to a lab for analysis.

What the Results Mean

Results will show the concentration of specific fatty acids in your blood. Abnormal levels may indicate metabolic imbalances, but your doctor will interpret these in the context of your overall health and symptoms.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Fatty Acid Screening

Frequently asked questions

How long will I need to wait for my results?
Results are typically available within 1–3 business days, depending on lab processing times. Your doctor will contact you directly with the findings.
What does it mean if my fatty acid levels are outside the expected range?
If your results are abnormal, your doctor may recommend further testing, dietary changes, or genetic counseling. Always discuss findings with your healthcare provider to understand next steps.
Can I eat or drink anything before the test?
Follow your doctor’s instructions—some tests require fasting, while others do not. If unsure, ask before scheduling your appointment.
  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