Quick Facts
- Sample: Blood
- Fasting: No special preparation required
- Turnaround: 3-5 business days. May take longer based on weather, holiday, or lab delays.
What This Test Measures
This test measures allergen-specific IgE antibody levels in a blood sample to detect sensitization to Brussel sprouts. When the immune system perceives Brussel sprouts as a threat, it produces IgE antibodies against proteins in the vegetable, which can trigger histamine release and allergic symptoms upon exposure. This test evaluates only the IgE response to Brussel sprouts (biomarker F217-IgE Brussel Sprouts) and does not measure IgE or IgG levels for any other food.
Benefits
- Measures IgE antibody response specific to Brussel sprouts
- Uses a simple blood draw, no special preparation needed
- Results typically available in 3-5 days
- Provides objective lab data to discuss with a healthcare provider
- Focused on a single, clearly defined allergen
Who Is This Test For?
- People who suspect they experience symptoms after eating Brussel sprouts
- Individuals wanting objective lab data on Brussel sprouts sensitization to discuss with a provider
- People with a personal or family history of food allergies who eat Brussel sprouts
- Those who have noticed symptoms such as tingling, swelling, or digestive discomfort after eating Brussel sprouts
- Individuals working with a healthcare provider to help evaluate a suspected Brussel sprouts allergy
How It Works
- Order Your Test Online
- Visit a Local Lab
- Get Results Online
FAQ
1. What does this test measure, and how is it different from other food allergy tests?
This test measures allergen-specific IgE antibodies to Brussel sprouts only, using a blood sample. It is not a food allergy panel and does not evaluate other Brassicaceae vegetables, such as broccoli, cabbage, cauliflower, or kale, or any other food. If you are concerned about reactions to other foods, separate testing for those specific allergens would be needed.
2. Who should consider this test, and when?
People who have noticed symptoms after eating Brussel sprouts, such as tingling around the mouth, swelling, digestive upset, or hives, may want to consider this test. It can also be relevant for those with a personal or family history of food allergies who want objective data specific to Brussel sprouts before discussing next steps with a healthcare provider.
3. Do I need to fast or prepare for this test?
No special preparation is required for this test. You can visit the lab for your blood draw without fasting or making other adjustments beforehand.
4. How quickly will I get my results?
Results are typically available within 3-5 days of your blood draw. This timeframe may extend due to weather, holidays, or other lab delays.
5. How should I interpret my results, and what if they are abnormal?
Your result reflects the level of IgE antibodies specific to Brussel sprouts in your blood sample, and interpretation depends on this measurement alongside your symptoms, exposure history, and other clinical factors. A positive result does not by itself confirm a clinical Brussel sprouts allergy, and a negative result does not guarantee that Brussel sprouts can be consumed without a reaction. If your results fall outside the expected range, review them with a qualified healthcare provider, who can help determine whether further evaluation is appropriate based on your history and symptoms.
Disclaimer: Reference ranges may vary by laboratory. Listed ranges are general guidelines and may differ from those used by the performing lab. Always consult your healthcare provider for interpretation.
Pre-test preparation
No special preparation required.
Cross-Reactivity
Cross-reactivity can occur when the immune system recognizes similar proteins shared between different allergen sources, such as certain foods, pollens, or plant families. This test measures only IgE antibodies to Brussel sprouts and does not test for the pollens, foods, or other substances described below. The examples that follow are not an exhaustive list, and they represent possible additional considerations rather than confirmed allergies. Having a documented cross-reactive relationship does not mean a person will necessarily experience a clinical reaction to the related allergen. Depending on your symptoms, history, or healthcare provider's guidance, testing for related allergens may also be worth discussing.
- Mugwort pollen: Mugwort-sensitized individuals have been reported to develop reactions to mustard and other Brassicaceae vegetables (a pattern described as mugwort-mustard allergy syndrome), through shared allergenic proteins.
- Other Brassicaceae vegetables (broccoli, cabbage, cauliflower): As close botanical relatives of Brussel sprouts, these vegetables have been associated in some patients with shared IgE reactivity, particularly among those also sensitized to mugwort pollen.
- Peach and other Rosaceae fruits: Lipid transfer proteins found in Brassicaceae vegetables have been shown to share IgE-binding properties with lipid transfer proteins in peach and related fruits, contributing to broader cross-reactivity patterns in some individuals.
These relationships are complex and vary between individuals, so they should not be interpreted as a prediction of your own reaction pattern. If related allergen reactions are a concern, additional evaluation may be considered based on your history and your healthcare provider's guidance.
