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Mountain West · Onion Allergy Test – Food Allergies

Onion Allergy Test – Food Allergies in Utah

This page explains the onion allergy test – food allergies, what it measures, and how to order it. An onion allergy test uses a blood sample to check for IgE antibodies that may indicate an allergic reaction to onion.

Sample typeBlood and/or urine at a collection lab
ReferralIncluded — no referral from your own doctor needed

Lab requirements in Utah

Here is what you need before ordering and completing the Onion Allergy Test – Food Allergies in UT. Review each item and confirm the details with the collection lab.

Physician's order
Included. A physician's order is required for lab testing and is provided for you by our partner's physicians — no referral from your own doctor is needed.
Fasting
Some tests require fasting or avoiding certain foods or drinks beforehand. You will be informed when you order — confirm the details with the collection lab.
Preparation
No special preparation is usually required, but follow the instructions provided by the collection laboratory. If you take medications, ask the lab or your clinician whether any adjustments…
Sample & visit
A blood and/or urine sample is collected; the visit usually takes about 10 minutes.
Identification
Bring the lab requisition form from your account. The collection lab may also ask for a government-issued photo ID.
Turnaround
1-3 business days
Availability
Our partner lab does not serve ND, RI, NY, NJ, MD or HI. Confirm availability for your location with the collection lab.

Before you go

  • Order your test before visiting a lab, then use the requisition form in your account.
  • Print the requisition form, or fax it to the lab directly from your account.
  • No scheduling is needed — visit the collection lab during its normal business hours.
  • A blood and/or urine sample is collected; the visit usually takes about 10 minutes.
  • Bring a government-issued photo ID in case the lab requests it.
  • Results are posted to your secure account within 1–3 business days.

Requirements are summarized from our partner lab's published policies. Preparation and availability can change — confirm current instructions with the collection lab before your visit.

What this test is

This test measures specific IgE antibodies in the blood that are associated with allergic sensitivity to onion. It is typically used alongside a clinical history to help evaluate whether onion may be triggering allergic symptoms.

What it measures

  • Onion-specific IgE — Reflects the level of IgE antibodies that bind to onion proteins.
  • Total IgE — Sometimes measured to provide context for allergic tendency, though not specific to onion.

What the test involves

A healthcare professional collects a small blood sample, usually from a vein in your arm, using a standard blood draw. The sample is then sent to a laboratory for analysis.

Why it is often ordered

A clinician may order this test when a person reports symptoms such as hives, itching, or digestive upset after eating onion or foods containing onion. It is often part of a broader evaluation for food allergies.

Preparation

No special preparation is usually required, but follow the instructions provided by the collection laboratory. If you take medications, ask the lab or your clinician whether any adjustments are needed.

How results are reported

Results are reported as a numeric value that is compared with a reference range established by the testing laboratory. Reference ranges can vary between laboratories, so results should be interpreted in the context of your symptoms and clinical history.

Before you go

  • Whether any medications you take could affect the test
  • The specific reference range used by the laboratory
  • How and when results will be shared with you

Cities

Onion Allergy Test – Food Allergies in Utah communities

Choose your city for local context and to order this test.

Salt Lake City1,135,344Onion Allergy Test – Food AllergiesOgden608,259Onion Allergy Test – Food AllergiesProvo551,645Onion Allergy Test – Food AllergiesWest Valley City139,361Onion Allergy Test – Food AllergiesSt. George127,890Onion Allergy Test – Food AllergiesWest Jordan116,045Onion Allergy Test – Food AllergiesLogan106,319Onion Allergy Test – Food AllergiesOrem96,734Onion Allergy Test – Food AllergiesSandy96,272Onion Allergy Test – Food AllergiesLayton80,858Onion Allergy Test – Food AllergiesSouth Jordan75,617Onion Allergy Test – Food AllergiesLehi73,911Onion Allergy Test – Food AllergiesMillcreek63,430Onion Allergy Test – Food AllergiesTaylorsville60,295Onion Allergy Test – Food AllergiesHerriman52,860Onion Allergy Test – Food AllergiesMurray50,183Onion Allergy Test – Food AllergiesDraper49,978Onion Allergy Test – Food AllergiesBountiful45,496Onion Allergy Test – Food AllergiesRiverton44,773Onion Allergy Test – Food AllergiesEagle Mountain42,905Onion Allergy Test – Food AllergiesSpanish Fork41,953Onion Allergy Test – Food AllergiesRoy39,076Onion Allergy Test – Food AllergiesPleasant Grove37,228Onion Allergy Test – Food AllergiesSaratoga Springs36,977Onion Allergy Test – Food AllergiesKearns36,842Onion Allergy Test – Food AllergiesMidvale35,313Onion Allergy Test – Food AllergiesTooele35,223Onion Allergy Test – Food AllergiesSpringville34,750Onion Allergy Test – Food AllergiesCedar City34,246Onion Allergy Test – Food AllergiesCottonwood Heights33,597Onion Allergy Test – Food AllergiesAmerican Fork32,822Onion Allergy Test – Food AllergiesKaysville32,438Onion Allergy Test – Food AllergiesClearfield31,802Onion Allergy Test – Food AllergiesHolladay31,738Onion Allergy Test – Food AllergiesSyracuse31,715Onion Allergy Test – Food AllergiesMagna29,128Onion Allergy Test – Food AllergiesWashington27,689Onion Allergy Test – Food AllergiesSouth Salt Lake26,086Onion Allergy Test – Food AllergiesFarmington23,990Onion Allergy Test – Food AllergiesClinton23,192Onion Allergy Test – Food AllergiesNorth Salt Lake21,411Onion Allergy Test – Food AllergiesPayson21,093Onion Allergy Test – Food AllergiesNorth Ogden20,703Onion Allergy Test – Food AllergiesHurricane19,501Onion Allergy Test – Food AllergiesBrigham City19,373Onion Allergy Test – Food AllergiesHighland18,913Onion Allergy Test – Food AllergiesSouth Ogden17,363Onion Allergy Test – Food AllergiesWest Haven16,918Onion Allergy Test – Food AllergiesCenterville16,711Onion Allergy Test – Food AllergiesBluffdale16,576Onion Allergy Test – Food AllergiesHeber16,416Onion Allergy Test – Food AllergiesSantaquin13,602Onion Allergy Test – Food AllergiesSmithfield13,263Onion Allergy Test – Food AllergiesGrantsville12,331Onion Allergy Test – Food AllergiesVineyard11,579Onion Allergy Test – Food AllergiesWoods Cross11,372Onion Allergy Test – Food AllergiesLindon11,346Onion Allergy Test – Food AllergiesMapleton11,226Onion Allergy Test – Food AllergiesWest Point10,963Onion Allergy Test – Food AllergiesPleasant View10,733Onion Allergy Test – Food Allergies