Quick Facts
- Sample: Blood
- Fasting: No special preparation is required
- Turnaround: 3-5 business days. May take longer based on weather, holiday, or lab delays.
What's Included
This test measures allergen-specific IgE antibodies to rice (F009-IgE Rice) in a blood sample. IgE antibodies are produced by the immune system in response to substances it identifies as harmful, and elevated levels to a specific allergen can indicate sensitization to that allergen.
This is a whole allergen test for rice, not a component-resolved test, and it reports on rice specifically rather than a group of foods. The result reflects your IgE antibody response to rice allergen extract, and it does not by itself confirm a clinical food allergy, predict how severe a reaction might be, or indicate whether rice is safe or unsafe for you to eat.
Benefits
- Measures IgE antibody response specifically to rice
- Simple blood draw with no special preparation
- Fast, private way to check rice sensitization status
- Results delivered online within days
- Can support a conversation with your healthcare provider
- Uses a single, clearly defined biomarker (F009-IgE Rice)
Who Is This Test For?
- People who have experienced symptoms after eating, touching, or inhaling steam from rice
- Individuals noticing symptoms like hives, itching, or swelling after rice exposure
- People with digestive symptoms, such as cramps or vomiting, following rice consumption
- Individuals wanting to check rice sensitization as part of a broader evaluation with a provider
- People trying to identify which specific food may be linked to a pattern of symptoms
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 IgE antibodies specifically to rice, using a single biomarker (F009-IgE Rice) rather than a panel of multiple foods. Unlike broader food allergy panels that screen many allergens at once, this test focuses only on rice, so it will not provide information about IgE levels for other foods, grains, or allergen components. It also measures whole allergen IgE rather than testing individual rice protein components.
2. Who should consider this test, and when?
Anyone who has noticed symptoms after eating rice, being near cooked rice, or inhaling steam from it may find this test relevant. Common triggers for considering testing include symptoms such as hives, itching or tingling around the mouth, digestive upset, coughing, or swelling that seem to follow rice exposure. Symptoms can appear anywhere from minutes to hours after contact, so tracking the timing of reactions alongside testing can be useful context to bring to a healthcare provider.
3. Do I need to fast or prepare for this test?
No special preparation is required for this test. You can schedule your blood draw at a local lab without fasting or adjusting your diet beforehand.
4. How quickly will I get results?
Results are typically available in 3-5 business days, though this may take longer depending on weather, holidays, or other lab delays. You'll be able to access your results online once they're ready.
5. How should I interpret my results, and what if they are abnormal?
An elevated IgE result indicates sensitization to rice, meaning your immune system has produced antibodies to rice proteins, but this alone does not confirm that you have a clinical food allergy or predict how your body would react if you consumed rice. A low or negative result does not guarantee that rice can be consumed without symptoms. Interpretation depends on your result alongside your symptom history, prior reactions, and other clinical context, so reviewing your results with a qualified healthcare provider is recommended before making any changes to your diet.
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.
If your results fall outside the expected range, your healthcare provider can help determine whether further evaluation is appropriate based on your individual history and symptoms.
Pre-test preparation
No special preparation is required.
Cross-Reactivity
Cross-reactivity can occur when the immune system recognizes proteins in one substance as similar to proteins in another, sometimes leading to a reaction to more than one allergen source. This test measures only IgE antibodies to rice and does not test for the additional foods, pollens, or substances mentioned below. The examples that follow are not an exhaustive list, and they represent possible additional considerations rather than confirmed allergies. Having a positive rice IgE result does not mean you will necessarily react to any of the items listed here. Depending on your symptoms, history, or prior reactions, discussing related allergen testing with your healthcare provider may be worthwhile.
- Peach (and its LTP protein, Pru p 3): Rice contains a lipid transfer protein (LTP) that has been reported to share structural similarity with peach LTP, and some peach-sensitized individuals have shown IgE reactivity to rice in research studies.
- Other cereal grains (wheat, barley, corn, oats, rye): Rice belongs to the grass family (Poaceae) along with these grains, and some shared proteins among cereal grains have been identified in research, though studies specifically looking at rice have found it does not show strong cross-reactivity with other cereals in most cases.
- Grass pollen: Because rice is a member of the grass family, some rice proteins, particularly in rice pollen, have shown laboratory cross-reactivity with pollen proteins from other grasses. This relationship has mainly been studied in the context of pollen (respiratory) allergy rather than confirmed food-based reactions to rice.
These relationships are drawn from allergy and immunology research and are intended for general educational context. They do not mean that testing for these additional allergens is required, and they are not a substitute for guidance from your healthcare provider based on your personal history and symptoms.
