Old Greenwich, CT
Onion Allergy Blood Test in Old Greenwich, CT
This IgE blood test checks for sensitization to onion. It is ordered when symptoms appear after eating onion or foods that contain it, or as part of a broader food allergy panel.
Order Onion Allergy Test in Old Greenwich, CT
Order online and visit a local collection site, or choose an at-home kit where available. No referral and no insurance required.
Order Onion Allergy Test- Typical turnaround
- 1-3 business days
- Starting price
- From $49
- Results
- Confidential, online
Quick answer
The Onion Allergy Test measures immunoglobulin E antibodies against onion. Onion is a staple ingredient in many kitchens, and allergy to it is uncommon, though reactions can occur and are sometimes linked to cross-reactivity with other alliums or pollen. The test is typically ordered when symptoms follow onion intake or when a wider food panel is being reviewed.
About this test in Old Greenwich
Onion belongs to the allium family along with garlic, leek, and chives. Allergy to onion is relatively rare, and some people who react to raw onion tolerate it when cooked, since heating changes some proteins. Reactions may appear as skin symptoms, digestive upset, or in more serious cases, breathing difficulty.
The test measures onion-specific IgE in a serum sample. A single blood draw provides the sample, and the laboratory reports a quantitative antibody level or reactivity class. When the test is part of a food panel, each allergen is reported separately, which helps show whether reactivity extends to related alliums.
A positive result indicates sensitization, not a guaranteed allergy. Some people have antibodies without symptoms, and others react only to certain forms of the food. A healthcare provider interprets the result with the person's reaction history and any other allergy testing that was performed.
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Frequently Asked Questions
Where can I get a onion allergy blood test in Old Greenwich, CT?
Old Greenwich has certified laboratories and local draw sites that offer this panel. Order online, then choose the collection location and time that suit you.
How much does a onion allergy blood test cost in Old Greenwich?
Self-pay pricing depends on the provider and collection site. The price shown at checkout is the price you pay, with no hidden fees.
How long do results take in Old Greenwich?
Most results are reported within 1-3 business days after collection and are delivered to your secure portal.
Can I collect this sample at home in Old Greenwich?
For select panels, at-home kits can be shipped to Old Greenwich, CT, collected at home, and mailed back in prepaid packaging.
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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Every page on this site is reviewed for clarity, sourcing, and accuracy. We update our library as testing options, collection networks, and accreditation standards change.