Corn Allergy Testing
Corn Allergy Testing can be requested without a referral, and this overview covers what to expect. Corn allergy testing uses a blood sample to check for allergic antibodies to corn proteins. It is ordered when a person has symptoms after eating corn or corn-based products, such as hives, stomach upset, or breathing trouble.
- Sample type
- blood
- Category
- Allergy
- Turnaround
- 1-3 business days
- Price
- $49
- Referral
- Not required
Corn allergy testing uses a blood sample to check for allergic antibodies to corn proteins. It is ordered when a person has symptoms after eating corn or corn-based products, such as hives, stomach upset, or breathing trouble.
What it measures
- Corn-specific IgE — Antibodies that can trigger allergic reactions to corn.
- Total IgE — A general measure of allergic tendency, not specific to corn.
- Component allergens (e.g., Zea m 14) — Individual corn proteins that may help show reaction patterns.
Who it is for
A doctor or allergist typically orders this test for people with suspected corn allergy or related symptoms.
Preparation
No fasting is needed. Tell your clinician about all medicines you take, especially antihistamines, as they may affect results.
Results and what they mean
Results are reported as antibody levels or a class score. A clinician interprets them with your symptoms and history; a positive result alone does not confirm an allergy. This is general information, 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 corn allergy testing 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 allergic to corn?
Not always. A clinician must review your symptoms and may recommend other tests.
How long does it take to get results?
Most results are ready in 1 to 3 business days.
Do I need to avoid corn before the test?
No. The test measures antibodies in your blood, so avoiding corn is not required beforehand.
Can this test tell me how severe a reaction will be?
No. It shows whether antibodies are present, but severity is judged by your symptoms and clinical history.