Test library
Pecan IgE Blood Test
This blood test measures IgE antibodies to pecan, a tree nut that can cause allergic reactions. Results help assess sensitization and are read with the person's symptom history.
Order Pecan Allergy Test
Order online and visit a local collection site, or choose an at-home kit where available. No referral and no insurance required.
Order Pecan Allergy Test- Typical turnaround
- 1-3 business days
- Starting price
- From $49
- Results
- Confidential, online
Quick answer
The Pecan Allergy Test is a blood test that checks for IgE antibodies against pecan, a tree nut commonly eaten on its own and in baked goods. Pecan belongs to the walnut family, and people who react to one member of that family may also react to another. The test helps show whether sensitization to pecan proteins is present and is interpreted along with the person's reaction history.
What this test measures
Tree nut allergens are proteins that the immune system can mistakenly identify as harmful. In pecan, several seed storage and defense proteins can bind IgE. A blood test measures the concentration of pecan-specific IgE, which reflects whether sensitization has occurred. Because the test detects antibodies rather than the reaction itself, it supports but does not replace a clinical evaluation.
Only a blood draw is needed, and results are usually reported as a quantitative value in kilounits per liter with a graded class. Some orders add total serum IgE or a broader tree nut panel that includes walnut, which shares proteins with pecan. Component testing for tree nuts is available for some species, and it can help refine the picture when requested.
People who have had symptoms after eating pecans or foods containing them may order this test, as may those with other food allergies or eczema. It can also help clarify reactions to mixed nut products where the specific trigger is unclear. A qualified healthcare provider should interpret the result with the person's history, examination, and any other testing.
- Pecan-specific IgE antibodies
- Tree nut extract markers when a broader panel is included
- Walnut cross-reactive markers when an expanded panel is ordered
- Quantitative allergen-specific IgE in kU/L
- Allergen-specific IgE class on a graded scale
- Total serum IgE when included
- Serum eosinophil count when included in the order
Why people order this test
- Investigate symptoms after eating pecans or pecan-containing foods
- Assess tree nut sensitization in people with other food allergies
- Add detail to a broader food or nut allergy evaluation
- Follow up on a positive tree nut screening result
- Help clarify reactions to baked goods and mixed nut products
- Support discussions about avoidance with a healthcare provider
How to prepare
No fasting is needed for this test. A blood sample is collected at the lab, and normal eating and drinking beforehand are generally acceptable. Follow the lab's instructions for any additional tests in the order.
Understanding your results
Results are generally available within one to three business days. A positive result indicates sensitization to pecan proteins, while a negative result makes pecan allergy less likely. A qualified healthcare provider should interpret the finding with your history and other results.
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Frequently Asked Questions
Is pecan allergy the same as peanut allergy?
No. Peanut is a legume and pecan is a tree nut, so they are different allergens. Some people are sensitized to both, but separate tests are used to check each one.
Why test for walnut at the same time?
Pecan and walnut are closely related, and their proteins can cross-react. Including both can help explain reactions to mixed tree nut products.
Can a high pecan IgE level predict a severe reaction?
No. Antibody concentrations overlap between mild and severe reactions, so the level alone cannot predict severity. Your healthcare provider considers your full history.
Can I react to pecan oil or pecan flavoring?
Reactions depend on the proteins present in the product. Refined oils may contain little protein while unrefined products may contain more. Discuss specific products with your healthcare provider.
How is the sample collected?
A small blood sample is drawn from a vein during a short lab visit. No skin testing is required.
Ready to get tested?
Order online and visit a collection site near you, or choose a mail-in kit. No referral and no insurance required.
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