Food Allergen Mix 13 IgE Antibodies, Serum — Radioallergosorbent Test (RAST)
A blood test that measures IgE antibodies to a panel of food allergens. The specific foods included may vary by laboratory.
["This test can help identify foods that may trigger an IgE-mediated allergy, but results must be interpreted alongside your symptoms and medical history."]
Key facts at a glance
- LOINC
- 82055-5
- Short code
- Food Allerg Mix13 IgE RAST
- Synonyms
- Food Allerg Mix13 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 13 is a screening blood test that measures allergen-specific IgE antibodies to a group of common food allergens. RAST is an older name for this type of IgE testing, and the exact foods in the panel can vary by laboratory.
Why might I need this test?
Your clinician may order this test to help evaluate a suspected food allergy, especially if you have symptoms such as hives, swelling, wheezing, vomiting, or other reactions after eating. It may also be used to guide further allergy evaluation or food-allergen testing.
How is the test performed?
A blood sample is collected and tested for IgE antibodies against each food in the panel. The laboratory may report each food separately, and the results usually include an interpretation such as negative, low, or high positive.
How do I prepare for the test?
No special preparation is usually required for this blood test. 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 pausing them.
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.
A positive result means that IgE antibodies to one or more tested foods are present, which can indicate an immune sensitization. It does not by itself prove that eating the food will cause an allergic reaction. Results should be interpreted by your clinician using your history, symptoms, and, when needed, additional allergy testing.
Short name
Food Allergen Mix 13 IgE
Frequently asked questions
Does a positive result mean I have a food allergy?
Which foods are included in Food Allergen Mix 13?
Can this test replace a food challenge?
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