Cauliflower-Specific IgG Antibody, Qualitative (RAST)
A qualitative blood test that checks for IgG antibodies directed against cauliflower proteins, which may reflect prior dietary exposure.
["A positive result shows that cauliflower-specific IgG was detected, but it does not by itself diagnose a food allergy."]
Key facts at a glance
- LOINC
- 21147-4
- Short code
- Deprecated Cauliflower IgG RAST Ql
- Synonyms
- Deprecated Cauliflower 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 that react with cauliflower proteins in a blood sample. It reports the result qualitatively, generally as detected or not detected.
Why might I need this test?
It may be included in food-specific antibody panels or ordered when a person's symptoms appear related to eating cauliflower. Results must be considered with the medical history, symptoms, and other allergy evaluations.
How is the test performed?
A blood sample is tested in the laboratory for antibodies that bind to cauliflower proteins. The RAST designation refers to an older antibody-testing method, and the result is reported as detected or not detected rather than as a measured concentration.
How do I prepare for the test?
No special preparation is usually required for this blood test. If the test is part of a broader allergy evaluation, tell your clinician about all medicines, supplements, recent changes in diet, and any symptoms following cauliflower exposure.
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 cauliflower-specific IgG may indicate previous exposure or an immune response to cauliflower. IgG results do not establish clinical allergy, and a positive result should not be interpreted as proof that cauliflower is causing symptoms.
Short name
Cauliflower IgG Antibody, Qualitative
Frequently asked questions
Does a positive result mean I am allergic to cauliflower?
What if no cauliflower-specific IgG is detected?
Is this the same as testing for IgE-mediated food allergy?
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