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Strawberry IgG Antibody, Qualitative — Radioallergosorbent Test (RAST), Deprecated

Published: August 9, 2026Updated: August 17, 2026

This qualitative test detects strawberry-specific IgG antibodies. It is deprecated and is not generally used to diagnose strawberry allergy.

Quick summary

["Detected strawberry-specific IgG usually indicates prior exposure but does not by itself confirm an allergy."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
21542-6
Short code
Deprecated Strawberry IgG RAST Ql
Synonyms
Deprecated Strawberry 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 is a qualitative laboratory test that looks for IgG antibodies directed against strawberry proteins. These antibodies can develop after the immune system is exposed to strawberry.

Why might I need this test?

It was historically used to evaluate possible food-related immune reactions. Because this test is deprecated, a clinician may instead recommend allergy testing that more directly assesses allergic sensitization.

How is the test performed?

A laboratory sample is tested for strawberry-specific IgG using a qualitative method, with the result reported as detected or not detected. The RAST designation refers to a radioallergosorbent-type testing approach.

How do I prepare for the test?

No special preparation is usually needed. Follow any instructions from your clinician, and do not stop medications or avoid foods unless your clinician specifically tells you to do so.

Reference range

Adult: 10-40 U/LN/A

Specimen: serum

No special preparation required. Avoid fatty meals before the test if possible.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Strawberry IgG antibody test

Frequently asked questions

Does a positive strawberry IgG result mean I am allergic to strawberries?
No. Strawberry-specific IgG can occur after ordinary exposure and is not considered reliable evidence of allergy. An allergist may use the result with your symptoms and other appropriate testing.
How is this different from a strawberry IgE test?
IgG and IgE are different antibody classes. IgE is more closely associated with immediate allergic reactions, while IgG often reflects exposure or a non-allergic immune response.
Why is this test considered deprecated?
It is not well supported for diagnosing food allergy and may lead to unnecessary concern or food restriction. Your clinician can recommend more appropriate allergy testing when needed.
  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 17, 2026. · Read our editorial policy