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Food Allergen Mix 14 IgE, Serum — Radioallergosorbent Test (RAST)

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

A blood test that measures IgE antibodies to a panel of 14 food allergens to help identify possible food sensitization.

Quick summary

["Elevated IgE to a food may indicate sensitization, but your symptoms and exposure history are needed to determine whether a true food allergy is present."]

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

Key facts at a glance

LOINC
82056-3
Short code
Food Allerg Mix14 IgE RAST
Synonyms
Food Allerg Mix14 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 blood test measures allergen-specific IgE antibodies to a panel of 14 foods. The exact foods included may vary by laboratory, so review the test report or ask your clinician which allergens were tested.

Why might I need this test?

It may be used to evaluate a suspected food allergy, especially when you have symptoms such as hives, swelling, vomiting, abdominal pain, coughing, or wheezing after eating a particular food. It can also help identify which foods are worth evaluating further.

How is the test performed?

A blood sample is collected and tested for IgE antibodies to each food in the panel. The laboratory reports the amount of antibody detected for each allergen.

How do I prepare for the test?

Fasting is usually not required. Tell your clinician about any allergy testing and medicines you are taking, and do not stop prescribed or recommended antihistamines without medical guidance.

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 14 IgE

Frequently asked questions

Does a positive result mean I have a food allergy?
Not necessarily. A positive result shows sensitization, and some people have positive tests without reacting to the food. Your clinician will interpret the result in the context of your symptoms and medical history.
Does the test diagnose which food caused my reaction?
It can identify likely food triggers, but it cannot fully confirm the cause of a past reaction. A clear reaction history and, in some cases, supervised oral food challenges may be needed.
Should I avoid foods based only on this result?
Discuss the result with your clinician before making major changes to your diet, especially if you have never reacted to a tested food. Avoiding a food unnecessarily may affect your nutrition and quality of life.
  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