Test library
Pistachio IgE Blood Test
This blood test measures IgE antibodies to pistachio, a tree nut in the cashew family. Results help assess sensitization and are read alongside the person's symptoms.
Order Pistachio 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 Pistachio Allergy Test- Typical turnaround
- 1-3 business days
- Starting price
- From $49
- Results
- Confidential, online
Quick answer
The Pistachio Allergy Test is a blood test that checks for IgE antibodies against pistachio, a green tree nut eaten on its own and used in many desserts and savory dishes. Pistachio belongs to the cashew family, and people who react to one member of that family may also react to another. The test helps show whether the immune system has become sensitized to pistachio proteins and is interpreted with the person's reaction history.
What this test measures
Tree nut allergens are proteins that can prompt the immune system to produce IgE antibodies. Pistachio contains several proteins that bind IgE in sensitized people. A blood test measures the concentration of pistachio-specific IgE, which reflects whether sensitization has occurred. Because it detects antibodies rather than the reaction itself, the result supports a clinical evaluation rather than replacing it.
Only a blood sample is needed, and results are usually reported as a quantitative value in kilounits per liter with a graded class. Expanded orders may include cashew, which is closely related to pistachio, as well as other tree nuts. Total serum IgE and eosinophil counts can also be included when a broader allergy panel is requested.
People who have had symptoms after eating pistachios may order this test, as may those with other food allergies or eczema being evaluated for additional sensitizations. It can also help clarify reactions to mixed nut products. A qualified healthcare provider should interpret the result with the person's history, examination, and any other testing.
- Pistachio-specific IgE antibodies
- Cashew cross-reactive markers when an expanded panel is ordered
- Other tree nut extract markers when a broader panel is included
- 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 pistachios or pistachio-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 desserts and mixed nut products
- Support avoidance discussions with a qualified healthcare provider
How to prepare
No fasting is required for this test. A blood sample is collected at the lab, and normal meals beforehand are generally fine. Follow the lab's instructions if other tests are included in the order.
Understanding your results
Results are typically available within one to three business days. A positive result indicates sensitization to pistachio proteins, while a negative result makes pistachio allergy less likely. A qualified healthcare provider should interpret the finding with your history.
Pistachio IgE Blood Test by state
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Frequently Asked Questions
Is pistachio related to cashew?
Yes. Pistachio and cashew belong to the same botanical family, and their proteins can cross-react. Testing for both can help explain reactions to mixed nuts.
Can pistachio allergy be severe?
Reactions vary between individuals and can range from mild to significant. Anyone with a history of severe reactions should seek guidance from a qualified healthcare provider.
Does a high result predict how severe a reaction will be?
No. Antibody levels overlap between mild and severe reactions, so the number alone cannot predict severity. Your healthcare provider uses your full history.
Can I eat foods that may contain traces of pistachio?
Decisions about trace exposure depend on your individual history and should be made with your healthcare provider.
How is the sample collected?
A small blood sample is drawn from a vein during a brief lab visit, with no skin testing 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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Every page on this site is reviewed for clarity, sourcing, and accuracy. We update our library as testing options, collection networks, and accreditation standards change.