Cabbage-Specific IgG, Qualitative — Radioallergosorbent Test (RAST) [Deprecated]
A deprecated test that detects IgG antibodies to cabbage. It indicates an immune response but does not by itself diagnose cabbage allergy.
["Detectable cabbage-specific IgG suggests prior immune exposure, but this result cannot confirm or exclude a food allergy."]
Key facts at a glance
- LOINC
- 21127-6
- Short code
- Deprecated Cabbage IgG RAST Ql
- Synonyms
- Deprecated Cabbage IgG RAST Ql
- Category
- liver
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 10
- Ref high
- 40
- Critical range
- — – 500 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 84484
- SNOMED
- 302774002
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
What is this test?
This test looks for IgG antibodies directed against cabbage proteins in a blood sample. It is listed as deprecated, meaning it is no longer routinely recommended or may have been replaced by another testing method.
Why might I need this test?
A clinician might review this older test when evaluating an immune response to cabbage or investigating a suspected food-related reaction. It may also appear in records from previous testing.
How is the test performed?
A blood sample is analyzed using radioallergosorbent testing methodology to look for antibodies that recognize cabbage. The result is reported as detectable or not detectable rather than as a general concentration range.
How do I prepare for the test?
Special preparation is generally not required for this type of blood test. Follow the laboratory's instructions and tell the healthcare provider if the test is being repeated because prior results or symptoms have changed.
Reference range
Adult: 10-40 U/LN/A
No special preparation required. Avoid fatty meals before the test if possible.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Detectable cabbage-specific IgG may indicate that the immune system has previously encountered cabbage proteins. IgG results do not reliably distinguish tolerance from allergy and should not be used alone to diagnose a food allergy. Because this test is deprecated, an allergist or other clinician should interpret it alongside symptoms, exposure history, and any more appropriate testing.
Short name
Cabbage-Specific IgG Test
Frequently asked questions
Does a positive cabbage IgG result mean I am allergic to cabbage?
What does a nondetectable result mean?
Why is this test marked as deprecated?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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 17, 2026. · Read our editorial policy