Skip to content

Food Allergen Mix 26 IgE, Serum — Radioallergosorbent Test (RAST)

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

A blood test that measures IgE antibodies to a panel of 26 food allergens to help evaluate possible food allergy.

Quick summary

["This test screens for immune sensitization to 26 foods but must be interpreted alongside your symptoms and medical history."]

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

Key facts at a glance

LOINC
82064-7
Short code
Food Allerg Mix26 IgE RAST
Synonyms
Food Allerg Mix26 IgE RAST
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
Method
multidisk
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 measures food-specific IgE antibodies in your blood. It screens for an immune response to a panel of 26 commonly tested foods.

Why might I need this test?

It may be ordered if you have symptoms such as hives, swelling, vomiting, abdominal pain, wheezing, or difficulty breathing after eating certain foods. Results can help identify which foods may require further evaluation.

How is the test performed?

A blood sample is collected, and the serum is analyzed in a laboratory for IgE antibodies against the foods included in the panel.

How do I prepare for the test?

Fasting is usually not required. Tell your clinician about your symptoms, suspected food reactions, recent exposures, and all medicines or supplements you are taking; do not stop any medication unless instructed.

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

Food Allergen Mix 26 IgE (RAST)

Frequently asked questions

Does a positive result mean I have a food allergy?
Not necessarily. A positive result shows that IgE antibodies were detected, which may reflect true allergy or cross-reactivity, so symptoms and medical history must also be considered.
Can this test identify the exact food causing my reaction?
It screens for a broad panel of 26 foods and may point to possible triggers. Targeted testing or a supervised oral food challenge may be needed to confirm the cause.
What if I have no symptoms when I eat the food?
A positive antibody result can occur without symptoms. Your clinician can help determine whether the food needs to be avoided based on the combined clinical and test findings.
  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