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Broccoli IgE Test

A broccoli allergy test measures IgE antibodies against broccoli proteins in a blood sample. It helps explain itching, hives, or digestive symptoms that appear after eating this vegetable.

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Typical turnaround
1-3 business days
Starting price
From $49
Results
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Quick answer

The broccoli allergy test is a blood test that measures immunoglobulin E antibodies against broccoli. It is ordered when someone reports symptoms such as oral itching, tingling, hives, or digestive discomfort after eating broccoli or related vegetables. Reactions to vegetables are less common than reactions to some other foods, so the result is interpreted with your symptom history and any other allergy tests your provider selects.

What this test measures

Broccoli is a cruciferous vegetable in the Brassica family, which also includes cabbage, cauliflower, kale, and Brussels sprouts. Allergic reactions to broccoli are uncommon but reported, and they can involve mild oral itching or tingling, hives, skin redness, or digestive upset. In some people, symptoms occur because of cross-reactivity between vegetable proteins and pollens rather than a direct sensitivity to broccoli itself.

The test measures allergen-specific IgE in serum using a laboratory immunoassay. A single blood sample is collected, and the laboratory reports the antibody level along with a reactivity class. Because vegetables in the same plant family share some proteins, a broccoli result is often reviewed together with tests for related cruciferous vegetables to see whether reactivity is specific or broad.

A positive result shows sensitization, not necessarily a clinical allergy. Some people have antibodies without symptoms, and reactions depend on exposure and individual sensitivity. A clinician interprets the finding with a careful food and symptom history. Anyone who has had breathing trouble, throat swelling, or fainting after eating should seek emergency care and discuss the episode with a qualified healthcare provider.

  • Broccoli-specific IgE antibodies
  • Total serum IgE
  • Quantitative allergen-specific IgE level
  • IgE reactivity class for broccoli
  • Related cruciferous vegetable allergens
  • Cross-reactive pollen-food proteins

Why people order this test

  • Investigate oral itching or hives after eating broccoli
  • Assess reactions to related cruciferous vegetables
  • Support a broader food allergy evaluation
  • Compare reactivity across vegetables in the same family
  • Provide objective information before discussing dietary changes with a provider
  • Follow up on digestive symptoms linked to vegetable intake
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How to prepare

No fasting is needed for this test. A blood sample is collected from a vein, usually at the arm. Follow any instructions provided by the laboratory regarding timing or current medications.

Understanding your results

Results are generally available within one to three business days. The report shows the specific IgE level and a reactivity class for broccoli. An elevated value indicates sensitization, and only a healthcare provider can interpret it in the context of symptoms and exposure.

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Frequently Asked Questions

What does a broccoli allergy test measure?

It measures IgE antibodies that react to broccoli proteins. The result shows whether the immune system has been sensitized to the vegetable.

Can I react to other vegetables in the same family?

Cruciferous vegetables share some proteins. A provider may review results from related vegetables to understand whether reactivity is broad.

How is the sample collected?

A small blood sample is drawn from a vein, usually at the arm, and the serum is tested for specific IgE antibodies.

Do I need to fast before the test?

No fasting is required. If the test is combined with a panel that calls for fasting, the laboratory provides specific instructions.

What does a positive result mean?

A positive result indicates sensitization. Whether it causes symptoms depends on exposure and individual sensitivity, which a healthcare provider evaluates.

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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.

Medical disclaimer. The information on LabOrdering.com is educational only and is not medical advice, diagnosis, or treatment. Reference ranges and clinical guidance vary between laboratories. Always consult a qualified healthcare provider about your own results and care.