Spinach-Specific IgG Antibody Test
Detects IgG antibodies directed against spinach proteins. Results may indicate an immune response but do not by themselves diagnose a spinach allergy.
["This test measures the immune response to spinach proteins, but a positive result does not necessarily mean you have an allergy."]
Key facts at a glance
- LOINC
- 102821-6
- Short code
- Spinach IgG RAST
- Synonyms
- Spinach IgG RAST
- Category
- tumor-marker
- 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
- Method
- rast
- 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 your immune system has produced in response to spinach proteins. Food-specific IgG testing is different from testing for an immediate food allergy.
Why might I need this test?
A clinician may order it to evaluate an immune response to spinach, particularly when a food-related reaction has been reported. The result is usually interpreted alongside symptoms, medical history, and other allergy testing.
How is the test performed?
A laboratory analyzes a patient sample for antibodies against spinach. The specimen and measurement method are not clearly identified by this test abbreviation, so the laboratory or ordering clinician should confirm the exact procedure.
How do I prepare for the test?
Fasting and a deliberate spinach challenge are generally not required for antibody testing. Follow any specimen-specific instructions from the laboratory, and do not stop prescribed medicines unless your clinician tells you to.
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 or elevated spinach-specific IgG may indicate that your immune system has responded to spinach proteins, but it does not by itself establish a clinical allergy. A low or absent result does not prove that you have never encountered spinach or cannot have an allergic reaction. Because RAST commonly refers to IgE-based allergy testing, confirm with the laboratory whether the ordered test is for IgG or IgE.
Short name
Spinach IgG antibodies
Frequently asked questions
Does a positive result mean I am allergic to spinach?
Is this the same as a RAST test?
Do I need to avoid spinach before the test?
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