Walnut Allergy Test
Walnut Allergy Test is a laboratory test you can order directly. A walnut allergy test is a blood test that checks for allergic sensitivity to walnut proteins. It is usually ordered when a person has had symptoms after eating walnuts or other tree nuts, or when a doctor needs to confirm or rule out a walnut allergy.
- Sample type
- blood
- Category
- Allergy
- Turnaround
- 1-3 business days
- Price
- $49
- Referral
- Not required
A walnut allergy test is a blood test that checks for allergic sensitivity to walnut proteins. It is usually ordered when a person has had symptoms after eating walnuts or other tree nuts, or when a doctor needs to confirm or rule out a walnut allergy.
What it measures
- Walnut-specific IgE antibodies — Measures the amount of allergy-related antibodies your immune system makes against walnut proteins.
- Total IgE — Sometimes measured as a general indicator of allergic tendency, though it cannot confirm a specific allergy.
- Component allergens (e.g., Jug r 1, Jug r 3) — Specific walnut proteins that may help show how severe or persistent an allergy could be.
Who it is for
A primary care doctor, allergist, or pediatrician typically orders this test. It is often used for people with a history of reactions to walnuts or other tree nuts.
Preparation
No fasting or special preparation is needed. You can eat and drink normally before the blood draw, and take your usual medications unless your doctor says otherwise.
Results and what they mean
Results are reported as a number for walnut-specific IgE, often with a reference range. Higher levels suggest a greater likelihood of allergy, but results must be interpreted by a clinician along with your symptoms and history. This is general information only and not medical advice.
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 walnut 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 to walnuts?
Not always. A positive blood test shows sensitivity, but only a doctor can diagnose an allergy after considering your symptoms and medical history.
Can this test tell me how severe my reaction will be?
No. The level of IgE does not reliably predict how severe a future reaction might be. Your doctor will assess your risk based on your overall picture.
Do I need to avoid all tree nuts if I am allergic to walnuts?
Not necessarily. Some people with walnut allergy can tolerate other tree nuts, but this depends on your specific test results and history. Ask your allergist for guidance.
How long does it take to get results?
Results are typically available within 1 to 3 business days after your blood sample is collected.