Pineapple-Specific IgG Antibody, Qualitative (Radioallergosorbent Test) — Deprecated
A qualitative blood test for IgG antibodies directed against pineapple. A positive result does not by itself diagnose pineapple allergy.
["Detectable pineapple-specific IgG may reflect prior exposure or immune recognition, but it does not confirm a food allergy."]
Key facts at a glance
- LOINC
- 21463-5
- Short code
- Deprecated Pineapple IgG RAST Ql
- Synonyms
- Deprecated Pineapple 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 proteins from pineapple in a blood sample. The result is reported as positive or negative. This is a deprecated assay and may not be routinely available.
Why might I need this test?
It may have been used to evaluate a possible immune response to pineapple or to guide an allergy evaluation. Because food-specific IgG results do not reliably distinguish allergy from tolerance, they should not be used alone to make a diagnosis.
How is the test performed?
A blood sample is tested against pineapple allergen using a radioallergosorbent or related allergen-antibody method. The laboratory then determines whether pineapple-specific IgG is detectable.
How do I prepare for the test?
Fasting is usually not required. Tell the healthcare professional if you have had a recent allergic reaction, take immune-modifying medicines, or have been told to avoid pineapple, because these factors may affect interpretation.
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.
A positive result means pineapple-specific IgG is detectable and may reflect previous exposure or an immune response. It does not prove that pineapple causes symptoms, and a negative result does not completely rule out a reaction. Current food-allergy evaluation generally relies on the clinical history, timing of symptoms, and sometimes skin-prick or IgE-specific testing.
Short name
Pineapple-specific IgG antibody test
Frequently asked questions
Does a positive result mean I am allergic to pineapple?
Is this the same as a pineapple-specific IgE test?
What should I do if this test is positive?
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