Understanding Lab Tests for Peanut Allergy
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Peanut allergy is one of the most common and potentially severe food allergies, affecting both children and adults. Blood tests play a crucial role in diagnosing peanut allergies by measuring specific antibodies that the immune system produces in response to peanut proteins.
Top Recommended Test
Food Allergen Profile, IgE With Component Reflexes
This comprehensive test measures IgE antibodies specific to peanuts (F13), providing a direct indication of allergic response. High levels of peanut-specific IgE antibodies confirm a peanut allergy and can help predict the likelihood of severe reactions including anaphylaxis, hives, and digestive problems.
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How Blood Tests Diagnose Peanut Allergies
When someone with a peanut allergy is exposed to peanut proteins, their immune system produces specific antibodies, primarily IgE and sometimes IgG. Blood tests can detect and measure these antibodies to confirm an allergic reaction and help assess the severity of the allergy. This testing is essential for proper diagnosis and management of peanut allergies.
Other Relevant Tests
Food Specific IgG Allergy (Pediatric) Panel
This specialized pediatric panel measures IgG antibodies against peanuts, which can indicate an immune response to peanut proteins. Elevated peanut IgG levels may suggest allergic reactions that can manifest as skin reactions, digestive issues, or in severe cases, anaphylaxis, making it particularly valuable for diagnosing food allergies in children.
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Understanding Your Results
Test results showing elevated peanut-specific antibodies indicate an immune response to peanut proteins. Higher antibody levels generally correlate with more severe allergic reactions. These results, combined with clinical symptoms and medical history, help healthcare providers develop appropriate management strategies and emergency action plans.
Important Considerations
The information here is for educational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for diagnosis and treatment. If you suspect a peanut allergy, especially if severe reactions have occurred, seek immediate medical attention.
