Test library
Parsley Sensitivity Test
This blood test measures IgE antibodies to parsley proteins, helping assess whether parsley contributes to food or pollen-related allergy symptoms. Results are interpreted with the person's history.
Order Parsley 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 Parsley Allergy Test- Typical turnaround
- 1-3 business days
- Starting price
- From $49
- Results
- Confidential, online
Quick answer
The Parsley Allergy Test is a blood test that checks for IgE antibodies against parsley, a culinary herb used fresh, dried, and in spice blends. Some people react to parsley with itching or swelling around the mouth, while others notice skin or digestive symptoms after eating it. The test helps determine whether sensitization to parsley proteins is present and is typically reviewed alongside a description of reactions and other allergy results.
What this test measures
Parsley contains proteins that can act as allergens, including a PR-10 type protein known as Api g 1 and other defense-related proteins. Sensitized people produce IgE antibodies that recognize these proteins. A blood test measures the concentration of parsley-specific IgE, which shows whether the immune system has developed antibodies against the herb. The result is one piece of the clinical picture rather than a diagnosis on its own.
The test requires only a blood draw, and results are usually reported as a quantitative value in kilounits per liter with a graded class. When a component test is added, markers such as Api g 1 can help distinguish a pollen-related cross-reaction from sensitization to more stable parsley proteins. Total serum IgE and a small set of related plant allergens are sometimes included in expanded orders.
People who develop oral itching, hives, or digestive upset after eating parsley may order this test, as may those with known birch pollen or mugwort pollen allergy who notice reactions to herbs and spices. It can also be included in a broader food and spice allergy panel. A qualified healthcare provider should interpret the finding with the person's reaction history and other test results.
- Parsley-specific IgE antibodies
- Api g 1 (PR-10) component when component testing is included
- Other parsley protein components when a component panel is ordered
- Quantitative allergen-specific IgE in kU/L
- Allergen-specific IgE class on a graded scale
- Total serum IgE when included
- Related birch or mugwort pollen markers when an expanded panel is ordered
Why people order this test
- Investigate itching, tingling, or swelling after eating parsley
- Check for cross-reactivity in people with birch or mugwort pollen allergy
- Add detail to a broader food or spice allergy evaluation
- Clarify reactions to mixed dishes and spice blends that contain parsley
- Follow up on a positive herb or food screening result
How to prepare
No fasting is required. A blood sample is collected at the lab, and normal meals are usually fine before the draw. Follow the lab's instructions if other tests are included in the same order.
Understanding your results
Results are usually available within one to three business days. A positive result suggests sensitization to parsley proteins, while a negative result makes parsley allergy less likely. The result should be interpreted by a healthcare provider together with your symptoms.
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Frequently Asked Questions
Can parsley cause a serious allergic reaction?
Reactions to parsley are often mild, such as itching or tingling in the mouth, but more significant reactions can occur. Anyone with a history of severe reactions should seek advice from a qualified healthcare provider.
Why does parsley allergy sometimes appear with pollen allergy?
Some parsley proteins resemble proteins in birch and mugwort pollen. People sensitized to those pollens may react to parsley and related herbs because the immune system recognizes similar structures.
Does cooking parsley make it safe for people with this allergy?
Heating can change some plant proteins, but reactions vary between individuals. Do not assume cooked parsley is safe without guidance from your healthcare provider.
Is this the same as a celery allergy test?
No. Parsley and celery are different plants with different allergen profiles, although they can cross-react in some people. Each test measures IgE against its own allergen extract.
How is the sample collected?
A small blood sample is drawn from a vein, usually in the arm, 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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