Test library
White Potato Allergy Test
This blood test measures IgE antibodies to white potato proteins, helping assess potato allergy. Results are interpreted with the person's reactions and other allergy findings.
Order Potato Allergy Test
Order online and visit a local collection site, or choose an at-home kit where available. No referral and no insurance required.
Order Potato Allergy Test- Typical turnaround
- 1-3 business days
- Starting price
- From $49
- Results
- Confidential, online
Quick answer
The Potato Allergy Test is a blood test that checks for IgE antibodies against white potato, a staple food used in many forms. Potato allergy is uncommon but can occur, with reactions ranging from mouth itching to skin or digestive symptoms after eating cooked, fried, or raw potato. The test helps show whether the immune system has become sensitized to potato proteins and is interpreted with the person's reaction history.
What this test measures
White potato contains several proteins that can act as allergens, and sensitization may occur after repeated exposure. When the immune system produces IgE antibodies against these proteins, symptoms can follow exposure to the food. A blood test measures the concentration of potato-specific IgE, indicating whether sensitization has developed. The result supports a clinical evaluation rather than serving as a diagnosis on its own.
Only a blood sample is needed, and results are usually reported as a quantitative value in kilounits per liter with a graded class. Potato belongs to the nightshade family, so expanded panels may include related foods such as tomato and pepper when cross-reactivity is being considered. Total serum IgE and eosinophil counts may also be included in a broader food allergy workup.
People who notice symptoms after eating potatoes may order this test, as may those with other food allergies being evaluated for additional sensitizations. It can also help clarify reactions to mixed dishes where several ingredients could be involved. A qualified healthcare provider should interpret the result with the person's history, symptom timing, and other test results.
- White potato-specific IgE antibodies
- Quantitative allergen-specific IgE in kU/L
- Allergen-specific IgE class on a graded scale
- Total serum IgE when included
- Related nightshade food markers when an expanded panel is ordered
- Serum eosinophil count when included in the order
Why people order this test
- Investigate symptoms after eating cooked, fried, or raw potato
- Assess potato sensitization as part of a broader food allergy evaluation
- Check related nightshade foods when a panel is ordered
- Follow up on a positive food allergy screening result
- Help clarify reactions to mixed dishes containing potato
- Support dietary discussions with a qualified healthcare provider
How to prepare
No fasting is required. A blood sample is collected at the lab, and normal eating and drinking beforehand are generally fine. Follow the lab's instructions if additional tests share the same order.
Understanding your results
Results are generally available within one to three business days. A positive result suggests sensitization to potato proteins, while a negative result makes potato allergy less likely. A healthcare provider should interpret the finding with your symptoms and history.
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Frequently Asked Questions
Is potato a common allergen?
Potato allergy is relatively uncommon compared with allergies to milk, egg, peanut, or shellfish, but it does occur and can be evaluated with specific IgE testing.
Can I react to raw potato but not cooked potato?
Some potato proteins are altered by cooking, so reaction patterns can differ between raw and cooked forms. Individual responses vary, and your healthcare provider can help interpret yours.
Is sweet potato tested with white potato?
No. Sweet potato belongs to a different plant family and has its own allergen profile, so it is tested separately if needed.
Can potato allergy be related to tomato or pepper allergy?
Potato is in the nightshade family along with tomato, pepper, and eggplant, and cross-reactivity is possible in some people. Expanded panels can check related foods.
How is the sample collected?
A small blood sample is drawn from a vein during a short lab visit.
Ready to get tested?
Order online and visit a collection site near you, or choose a mail-in kit. No referral and no insurance required.
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