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Food Allergen Mix 6–Specific IgE, Serum — Radioallergosorbent Test (RAST)

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

A blood test that measures IgE antibodies to the food allergens included in a mixed allergen panel, helping assess possible food allergy sensitization.

Quick summary

["Detects food-specific IgE antibodies that may indicate an immune sensitization to the allergens tested."]

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

Key facts at a glance

LOINC
82554-7
Short code
Food Allerg Mix6 IgE RAST
Synonyms
Food Allerg Mix6 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?

Food Allergen Mix 6–Specific IgE is a blood test that measures IgE antibodies against a group of food allergens. The exact foods represented by “Mix 6” may vary, so check your test report or ask the laboratory which allergens were included.

Why might I need this test?

Your clinician may order this test after a possible food reaction, unexplained hives or swelling, or eczema that is suspected to be related to food. It can help identify which foods may warrant further allergy evaluation.

How is the test performed?

A blood sample is collected and tested for allergen-specific IgE using a laboratory method sometimes called RAST. Results are reported for the individual foods included in the panel.

How do I prepare for the test?

Fasting is usually not required. Antihistamines and some other allergy medicines can affect results, so tell your clinician about all medicines and supplements you take and follow any instructions about temporarily stopping them.

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 6-Specific IgE

Frequently asked questions

Does a positive result mean I am allergic to these foods?
Not necessarily. It indicates possible sensitization, which must be interpreted with your symptoms, medical history, and sometimes skin-prick testing or supervised food testing by an allergy specialist.
Which foods are included in Food Allergen Mix 6?
The allergens in a numbered mix can vary by laboratory or test product. The foods tested should be listed on your laboratory report or requisition.
Can I eat a food that has a positive IgE result?
Ask your clinician before deliberately eating the food, especially if you have previously had hives, swelling, breathing difficulty, or other reactions. Your clinician can advise whether avoidance or confirmatory testing is appropriate.
  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