Food Allergen Mix 1 IgE Antibodies, Serum — Radioallergosorbent Test (RAST)
A blood test that measures IgE antibodies to a group of common food allergens. The exact foods included depend on the laboratory's testing panel.
["Elevated IgE to a food allergen may suggest an immune-mediated allergy, but results must be interpreted with your symptoms and medical history."]
Key facts at a glance
- LOINC
- 82050-6
- Short code
- Food Allerg Mix1 IgE RAST
- Synonyms
- Food Allerg Mix1 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 mixture of common foods. IgE is an immune protein that can react with a particular food allergen; the foods represented in “Mix 1” may vary by laboratory.
Why might I need this test?
Your clinician may order it to help identify which foods could be causing symptoms such as hives, swelling, abdominal discomfort, vomiting, wheezing, or other allergic reactions. It may also be used to monitor food-allergy evaluation or follow-up.
How is the test performed?
A blood sample is collected and analyzed in the laboratory for IgE antibodies against the foods in the panel. This is often called a radioallergosorbent test, although many laboratories use a similar laboratory-based IgE assay.
How do I prepare for the test?
No special preparation is usually required. Tell your clinician about your symptoms, suspected food exposures, medications, and any known food allergies before the test is performed.
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.
Detectable or elevated allergen-specific IgE may be consistent with sensitization to the corresponding food. A positive result does not by itself prove that the food causes your symptoms, and some people have IgE antibodies without a clinical allergy. Interpretation should therefore be based on your history, symptoms, and sometimes additional testing or a supervised food challenge.
Short name
Food Allergen Mix 1 IgE
Frequently asked questions
Does a positive result mean I am allergic to every food in the panel?
Can I use this test to decide which foods to avoid?
What if my symptoms occur but the test is negative?
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