Quick Facts
- Sample: Blood
- Fasting: No special preparation required
- Turnaround: 3-5 business days. May take longer based on weather, holiday, or lab delays.
What's Included
This test measures allergen-specific IgE antibodies to white potatoes in a blood sample. It is a single food allergen test and does not include testing for any other foods, allergens, or nightshade family members.
The test reports results for one biomarker: IgE to white potato (whole allergen). Because it measures IgE, the results reflect immune sensitization to potato allergens, not a confirmed clinical allergy. The test does not distinguish between allergen components within potato, and it does not evaluate raw versus cooked potato exposure separately.
Benefits
- Measures IgE sensitization to white potato specifically.
- Uses a standard blood draw, no special preparation needed.
- Provides objective lab data to discuss with your provider.
- Supports evaluation of suspected reactions tied to potato.
- Delivers results in a defined turnaround window.
Who Is This Test For?
- Individuals who have experienced symptoms after eating, handling, or peeling potatoes.
- People whose healthcare provider is investigating a possible potato allergy.
- Individuals wanting objective IgE data on potato sensitization specifically.
- People who prefer a blood draw over skin prick testing for this allergen.
- Those working with a provider to narrow down a suspected food trigger involving potato.
How It Works
- Order Your Test Online
- Visit a Local Lab
- Get Results Online
FAQ
1. What does this test measure, and how is it different from other food allergy tests?
This test measures allergen-specific IgE to white potato only, using a single biomarker (F035-IgE Potato, White). Unlike a food allergy panel, it does not screen multiple foods at once, so a result reflects potato sensitization specifically and says nothing about other foods, including other nightshades.
2. Who should consider this test, and when?
Individuals who have noticed symptoms after eating, touching, or preparing potatoes, or whose healthcare provider is evaluating a possible potato allergy, may find this test relevant. It's intended as one piece of information within a broader clinical evaluation, not a standalone diagnostic step.
3. Do I need to fast or prepare for this test?
No special preparation is required for this test. You can arrive at the lab and have your blood drawn without fasting or adjusting your routine beforehand.
4. How long does it take to get results?
Results are typically available in 3-5 business days, though weather, holidays, or lab delays can extend this window. You'll be notified once your results are ready to view online.
5. How should I interpret my results, and what if they are abnormal?
A positive IgE result indicates sensitization to potato, but it does not by itself confirm a clinical allergy, predict how severe a reaction might be, or establish whether potato is safe or unsafe for you to eat. A negative result does not guarantee that potatoes can be consumed without any reaction. If your results fall outside the expected range, review them with a qualified healthcare provider, who can consider your history, symptoms, and any additional evaluation that may be appropriate. This test does not diagnose a food allergy or recommend a course of treatment on its own.
Disclaimer: Reference ranges may vary by laboratory. Listed ranges are general guidelines and may differ from those used by the performing lab. Always consult your healthcare provider for interpretation.
Pre-test preparation
No special preparation is required for this test.
Cross-Reactivity
Cross-reactivity can occur when the immune system recognizes proteins in one allergen source that closely resemble proteins in another, unrelated source. This test measures IgE to white potato only, and it does not test for the additional items discussed below. The examples here are not exhaustive, and they don't confirm that you will react to any of the listed items, they're offered as context that may or may not be relevant depending on your history, symptoms, and healthcare provider's guidance.
- Natural rubber latex: Potato contains patatin, a protein structurally similar to a recognized latex allergen. This relationship has been associated with latex-fruit syndrome, in which some latex-sensitized individuals also react to certain fruits and vegetables, including potato.
- Birch pollen: Potato is among the foods reported in pollen-food allergy syndrome (also called oral allergy syndrome), where proteins in birch pollen cross-react with proteins found in certain raw fruits and vegetables, sometimes including potato.
These associations are documented in the allergy literature, but having a pollen or latex allergy does not mean a potato reaction will necessarily occur, and a potato IgE result does not predict sensitivity to latex or pollen. If reactions involving these substances are a concern, discussing them and whether related testing might be worth considering with your healthcare provider may be a useful next step.
