Sweet Potato Allergy Test
Below is a plain-language overview of the sweet potato allergy test. A sweet potato allergy test is a blood test that looks for antibodies your immune system may make against proteins in sweet potato. It is usually ordered when someone has had symptoms such as hives, itching, stomach upset, or breathing trouble after eating sweet potato or foods containing it. The test helps a clinician assess whether sweet potato may be involved in an allergic reaction.
- Sample type
- blood
- Category
- Allergy
- Turnaround
- 1-3 business days
- Price
- $49
- Referral
- Not required
A sweet potato allergy test is a blood test that looks for antibodies your immune system may make against proteins in sweet potato. It is usually ordered when someone has had symptoms such as hives, itching, stomach upset, or breathing trouble after eating sweet potato or foods containing it. The test helps a clinician assess whether sweet potato may be involved in an allergic reaction.
What it measures
- Sweet potato-specific IgE — Antibodies that bind to sweet potato proteins; a higher level suggests sensitization.
- Total IgE — A general measure of allergic antibody in the blood, sometimes used for context.
- Component allergens — Specific sweet potato proteins that may be tested to refine risk assessment.
- Cross-reactive markers — Related plant proteins that can cause similar antibody results.
Who it is for
This test is typically ordered by an allergist, immunologist, or primary care clinician after a history of possible reactions to sweet potato. It may also be used when other tests have not clarified the cause of symptoms.
Preparation
No fasting is required for this blood test. Tell the clinician about any antihistamines or other medicines you take, because some can affect allergy test results.
Results and what they mean
Results are reported as antibody levels, often with a reference range or class score. A clinician interprets these numbers alongside your symptoms and history, because a positive result alone does not always mean you are allergic. This is general information only and is not medical advice; discuss your results with a qualified clinician.
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 sweet potato 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
Do I need to stop eating sweet potato before the test?
Follow your clinician's instructions. In most cases, no special diet change is needed, but do not eat a food you know causes a severe reaction.
Can this test tell me how severe my allergy is?
No. It shows whether antibodies are present, but severity is judged from your symptoms and medical history.
How long until I get results?
Results are usually available in 1 to 3 business days, though timing can vary by lab.
Is this test painful?
It uses a standard blood draw, which feels like a brief pinch. No needles stay in place.