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Midwest · Grapefruit Allergy Test – Citrus Allergies

Grapefruit Allergy Test – Citrus Allergies in Illinois

Below is a plain-language overview of the grapefruit allergy test – citrus allergies. A grapefruit allergy test checks for allergic antibodies in your blood that may react to grapefruit or related citrus fruits. It can help explain symptoms that appear after eating or touching these fruits.

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

Lab requirements in Illinois

Here is what you need before ordering and completing the Grapefruit Allergy Test – Citrus Allergies in IL. 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
Fasting is required for this test — follow the collection lab's instructions.
Preparation
Preparation is usually minimal, but specific instructions can vary by collection site. Follow the lab's instructions and ask the collecting laboratory if you have questions about…
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, which are proteins the immune system can make in response to allergens. A blood sample is analyzed to see whether antibodies that bind to grapefruit proteins are present. Results are interpreted alongside your symptom history and other allergy testing.

What it measures

  • Grapefruit-specific IgE — Reflects immune system sensitization to grapefruit proteins
  • Citrus cross-reactive IgE — May indicate antibody binding to related citrus allergens
  • Total IgE — Sometimes included as a general measure of allergic antibody level

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 someone reports symptoms such as itching, hives, swelling, or digestive upset after eating grapefruit or other citrus fruits. It is typically used with a detailed history to help evaluate whether an allergy is possible.

Preparation

Preparation is usually minimal, but specific instructions can vary by collection site. Follow the lab's instructions and ask the collecting laboratory if you have questions about medications, fasting, or timing.

How results are reported

Results are reported as a numerical level or a qualitative category, depending on the laboratory method used. Reference ranges and reporting formats vary by laboratory, so results should always be interpreted in the context of the lab that performed the test and your overall clinical picture.

Before you go

  • Whether any medications or foods need to be avoided before the blood draw
  • How long results usually take at that specific laboratory
  • Whether a repeat or additional allergy test is recommended based on your symptoms

Cities

Grapefruit Allergy Test – Citrus Allergies in Illinois communities

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

Chicago8,595,181Grapefruit Allergy Test – Citrus AllergiesRockford289,763Grapefruit Allergy Test – Citrus AllergiesRound Lake Beach287,012Grapefruit Allergy Test – Citrus AllergiesPeoria255,718Grapefruit Allergy Test – Citrus AllergiesAurora183,447Grapefruit Allergy Test – Citrus AllergiesSpringfield162,588Grapefruit Allergy Test – Citrus AllergiesChampaign153,278Grapefruit Allergy Test – Citrus AllergiesJoliet150,323Grapefruit Allergy Test – Citrus AllergiesNaperville149,013Grapefruit Allergy Test – Citrus AllergiesBloomington134,357Grapefruit Allergy Test – Citrus AllergiesElgin114,156Grapefruit Allergy Test – Citrus AllergiesWaukegan89,751Grapefruit Allergy Test – Citrus AllergiesDecatur88,002Grapefruit Allergy Test – Citrus AllergiesCicero84,905Grapefruit Allergy Test – Citrus AllergiesAlton83,705Grapefruit Allergy Test – Citrus AllergiesKankakee82,095Grapefruit Allergy Test – Citrus AllergiesEvanston78,454Grapefruit Allergy Test – Citrus AllergiesSchaumburg78,053Grapefruit Allergy Test – Citrus AllergiesArlington Heights77,283Grapefruit Allergy Test – Citrus AllergiesBolingbrook73,807Grapefruit Allergy Test – Citrus AllergiesPalatine67,754Grapefruit Allergy Test – Citrus AllergiesSkokie67,444Grapefruit Allergy Test – Citrus AllergiesDeKalb66,624Grapefruit Allergy Test – Citrus AllergiesCarbondale66,482Grapefruit Allergy Test – Citrus AllergiesDes Plaines60,413Grapefruit Allergy Test – Citrus AllergiesOrland Park58,622Grapefruit Allergy Test – Citrus AllergiesOak Lawn58,032Grapefruit Allergy Test – Citrus AllergiesBerwyn56,960Grapefruit Allergy Test – Citrus AllergiesMount Prospect56,510Grapefruit Allergy Test – Citrus AllergiesTinley Park55,988Grapefruit Allergy Test – Citrus AllergiesOak Park54,100Grapefruit Allergy Test – Citrus AllergiesWheaton53,762Grapefruit Allergy Test – Citrus AllergiesNormal53,446Grapefruit Allergy Test – Citrus AllergiesHoffman Estates52,153Grapefruit Allergy Test – Citrus AllergiesDowners Grove50,209Grapefruit Allergy Test – Citrus AllergiesGlenview48,150Grapefruit Allergy Test – Citrus AllergiesElmhurst45,661Grapefruit Allergy Test – Citrus AllergiesLombard44,311Grapefruit Allergy Test – Citrus AllergiesPlainfield44,296Grapefruit Allergy Test – Citrus AllergiesBuffalo Grove43,062Grapefruit Allergy Test – Citrus AllergiesMoline42,660Grapefruit Allergy Test – Citrus AllergiesBelleville42,463Grapefruit Allergy Test – Citrus AllergiesBartlett41,126Grapefruit Allergy Test – Citrus AllergiesRomeoville40,099Grapefruit Allergy Test – Citrus AllergiesCrystal Lake40,082Grapefruit Allergy Test – Citrus AllergiesCarol Stream39,895Grapefruit Allergy Test – Citrus AllergiesStreamwood39,736Grapefruit Allergy Test – Citrus AllergiesQuincy39,687Grapefruit Allergy Test – Citrus AllergiesPark Ridge39,562Grapefruit Allergy Test – Citrus AllergiesUrbana39,189Grapefruit Allergy Test – Citrus AllergiesWheeling39,104Grapefruit Allergy Test – Citrus AllergiesCarpentersville37,940Grapefruit Allergy Test – Citrus AllergiesHanover Park37,545Grapefruit Allergy Test – Citrus AllergiesRock Island37,519Grapefruit Allergy Test – Citrus AllergiesCalumet City36,065Grapefruit Allergy Test – Citrus AllergiesAddison35,999Grapefruit Allergy Test – Citrus AllergiesNorthbrook35,108Grapefruit Allergy Test – Citrus AllergiesOswego34,324Grapefruit Allergy Test – Citrus AllergiesWoodridge34,161Grapefruit Allergy Test – Citrus AllergiesGlendale Heights33,443Grapefruit Allergy Test – Citrus Allergies