Pistachio Allergy Test
This page explains the pistachio allergy test, what it measures, and how to arrange it. A pistachio allergy test checks your blood for antibodies that may indicate an allergy to pistachio. It is ordered when you have had symptoms after eating pistachios, such as hives, swelling, or trouble breathing, or when a clinician needs to confirm or rule out a pistachio allergy.
- Sample type
- blood
- Category
- Allergy
- Turnaround
- 1-3 business days
- Price
- $49
- Referral
- Not required
A pistachio allergy test checks your blood for antibodies that may indicate an allergy to pistachio. It is ordered when you have had symptoms after eating pistachios, such as hives, swelling, or trouble breathing, or when a clinician needs to confirm or rule out a pistachio allergy.
What it measures
- Pistachio-specific IgE — The main marker. IgE is an antibody linked to allergic reactions; this measures how much of it binds to pistachio proteins.
- Total IgE — Sometimes measured to give context, but a high total IgE alone does not mean you are allergic to pistachio.
- Component allergens (optional) — Specific pistachio proteins may be tested to help estimate reaction risk, but not all labs offer this.
Who it is for
A primary care clinician or allergist typically orders this test after a suspected reaction to pistachios or when evaluating a broader tree nut allergy.
Preparation
No fasting or special preparation is needed. You can eat and drink normally before the blood draw.
Results and what they mean
Results are reported as a number for pistachio-specific IgE, often with a reference range. A higher number suggests sensitivity, but the result must be interpreted by a clinician along with your symptoms and history. This is general information, not medical advice; talk to your clinician about what your result means for you.
How to order this test
- Choose the test and place a confidential order online.
- Select a certified collection site and pick a time that suits you.
- Have your specimen collected — most draws take only a few minutes.
- Review results in a secure portal, typically within 1–3 days.
Preparation, hours, and pricing vary by site; confirm details directly with the lab before your visit.
Availability by state
Direct-access online ordering for the pistachio allergy test is available in most states. It is currently unavailable in 6 states:
Everywhere else you can order confidentially and collect your sample at a certified site. Browse by state →
Frequently asked questions
Does a positive result mean I am definitely allergic?
No. A positive test shows your immune system makes IgE to pistachio, but only a clinician can tell if you have a true allergy based on your symptoms and exam.
Can I take this test if I am already having a reaction?
No. If you have trouble breathing, swelling, or other severe symptoms, seek emergency care right away. This test is for non-urgent evaluation.
Do I need to stop my allergy medicines before the test?
Usually not for a blood test. Antihistamines do not affect IgE blood results, but check with your clinician about any medicines you take.
How long until I get results?
Most labs return results in 1 to 3 business days. Your clinician's office will contact you to discuss them.