Skip to content

Fatty Acid Profile (72-Hour Total Lipid Metabolism Rate)

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

This test measures how your body processes fats over a 72-hour period, helping assess lipid metabolism and potential fat-related health risks.

Quick summary

["Understanding how your body breaks down fats can help identify metabolic or digestive issues."]

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

Key facts at a glance

LOINC
2271-5
Short code
Fat 72h Stl-mRate
Synonyms
Fat 72h Stl-mRate
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 Is Done

Your healthcare provider may order this test if you have symptoms like unexplained weight changes, digestive problems, or if you’re being evaluated for conditions affecting fat metabolism, such as certain metabolic disorders or malabsorption syndromes.

What to Expect Before the Test

No special preparation is typically required, but you may need to fast for a portion of the 72-hour period. Follow your provider’s instructions carefully to ensure accurate results.

How the Test Is Performed

Blood samples are collected at scheduled intervals over 72 hours to measure fat-related compounds in your bloodstream. The samples are analyzed to track fat metabolism trends.

What the Results Mean

Results help determine if fat metabolism is functioning normally or if there are abnormalities that may require further medical evaluation. Abnormal patterns could indicate metabolic disorders or other health concerns.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

72-Hour Fat Metabolism Rate

Frequently asked questions

How long does it take to get results from this test?
Results are typically available within 1–2 weeks, depending on the laboratory’s processing time and follow-up testing needs.
Can I eat or drink during the 72-hour test period?
You may need to follow a specific diet or fasting protocol, so always check with your healthcare provider for exact instructions.
What conditions might lead to ordering this test?
Conditions such as unexplained weight loss, recurrent digestive issues, or suspected metabolic disorders (e.g., mitochondrial diseases) may prompt this test.
  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