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Oral Cholesterol Absorption Test (Genetic Mutation Screening via DNA)

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

This test measures how well your body absorbs cholesterol from food, using a genetic mutation analysis to assess potential hereditary conditions.

Quick summary

["Helps identify genetic risks for cholesterol-related disorders and absorption issues."]

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

Key facts at a glance

LOINC
43747-5
Short code
OCA2 gene Mut Anl Bld/T
Synonyms
OCA2 gene Mut Anl Bld/T
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
molgen
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

What This Test Measures

The test evaluates cholesterol absorption by analyzing a specific genetic mutation linked to malabsorption syndromes. Blood or DNA samples are used to detect mutations in genes responsible for cholesterol metabolism, often combined with functional testing of absorption efficiency.

How the Test Works

You’ll ingest a special cholesterol-containing meal while wearing a bracelet to track absorption. Genetic testing of your DNA identifies mutations in genes like *NPC1L1* or *ABCG5/G8*, which can impair cholesterol absorption or cause hereditary disorders like sitosterolemia or familial hypercholesterolemia.

Why It Matters

Identifying these mutations helps diagnose conditions that may require dietary changes, medications, or monitoring to prevent complications like heart disease or cholesterol crystal buildup.

Common Conditions Linked to This Test

Genetic mutations detected may relate to rare disorders like sitosterolemia (excess plant sterols in blood) or other cholesterol malabsorption syndromes, which can cause elevated cholesterol or digestive issues.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test provides critical information for diagnosing hereditary cholesterol disorders, guiding personalized treatment plans, and preventing long-term cardiovascular risks associated with abnormal cholesterol metabolism.

Frequently asked questions

What does a positive result mean?
A positive result indicates a genetic mutation linked to impaired cholesterol absorption or a hereditary disorder. This may require further evaluation by a specialist to tailor dietary or medical management.
How is this test different from a standard cholesterol panel?
Unlike standard cholesterol tests (e.g., LDL, HDL), this test specifically assesses genetic mutations affecting absorption and metabolism, often used alongside functional tests to confirm diagnosis.
Is this test covered by insurance?
Coverage depends on your diagnosis (e.g., suspected hereditary disorder) and insurance policy. Check with your provider or insurance company for details.
  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