Peach Allergy Blood Panel

What this test measures

Peach contains several allergenic proteins. Pru p 1 belongs to the PR-10 family and is linked to birch pollen cross-reactivity, while Pru p 3 is a lipid transfer protein that can be associated with reactions to the fruit itself. A blood test measures IgE that binds peach proteins, indicating whether sensitization has occurred. The result supports clinical evaluation and does not measure how severe a future reaction might be.

Results are usually reported as a quantitative concentration in kilounits per liter with a graded class. When component testing is included, Pru p 1 and Pru p 3 levels can help explain whether a reaction is more likely related to pollen cross-reactivity or to the fruit. Laboratories may also report total serum IgE or related Rosaceae fruit markers in expanded panels.

People who react after eating fresh peaches may order this test, especially if they also have birch pollen allergy or react to apples, cherries, or other stone fruits. It can also be included in a wider fruit allergy workup when the specific trigger is unclear. A qualified healthcare provider should interpret the result with the person's symptoms, timing, and other allergy findings.

• Peach-specific IgE antibodies
• Pru p 1 (PR-10) component when component testing is included
• Pru p 3 (lipid transfer protein) component when component testing is included
• Quantitative allergen-specific IgE in kU/L
• Allergen-specific IgE class on a graded scale
• Total serum IgE when included
• Related Rosaceae fruit markers when an expanded panel is ordered

Why people order this test

• Investigate mouth itching or tingling after eating fresh peach
• Check for cross-reactivity in people with birch pollen allergy
• Add detail to a broader fruit or food allergy evaluation
• Help distinguish pollen-related reactions from fruit-specific sensitivity
• Follow up on a positive fruit allergy screening result
• Clarify reactions to mixed fruit dishes and preserves

How to prepare

No fasting is necessary for this test. A blood sample is collected at the lab, and normal eating and drinking beforehand are generally fine. Follow the lab's instructions if other tests are ordered at the same time.

Understanding your results

Results are typically available within one to three business days. A positive result indicates sensitization to peach proteins, while a negative result makes peach allergy less likely. A healthcare provider should interpret the finding together with your symptoms and other tests.