Tomato F25 IgE Biomarker Testing
It measures IgE antibodies to tomato to help assess an allergy pattern, with convenient ordering and Quest lab draw access through Vitals Vault.
From $29.49 · Quest Diagnostics
- No subscription
- HSA/FSA eligible
- Most results in 3–5 business days
A Tomato F25 IgE test checks whether your immune system has made IgE antibodies that recognize tomato. This is one way clinicians evaluate possible IgE‑mediated food allergy, especially when symptoms happen soon after you eat tomato.
Your result does not diagnose an allergy by itself. It is most useful when it is interpreted alongside your symptom history, timing of reactions, and sometimes other allergy tests.
Because tomato can also trigger non-allergic irritation (like reflux, histamine intolerance, or oral irritation from acidity), the goal of testing is often to separate “sensitization” from a clinically meaningful allergy pattern.
Do I need a Tomato F25 IgE test?
You may consider Tomato F25 IgE testing if you get symptoms that start quickly after eating tomato or tomato-containing foods (often within minutes to 2 hours). Examples include hives, itching, lip or tongue swelling, throat tightness, wheezing, vomiting, or sudden abdominal pain.
Testing can also be helpful if you have oral allergy syndrome (itching/tingling of the mouth or throat with raw fruits/vegetables) and you are trying to figure out whether tomato is part of a pollen-related cross-reaction pattern. In that situation, your clinician may compare tomato IgE with other foods and environmental allergens.
If your symptoms are delayed (many hours later), are mainly chronic (like ongoing bloating), or are inconsistent, an IgE test may not explain what is going on. In those cases, your clinician might focus on other causes and use different testing strategies.
Use this test to support clinician-directed care, not to self-diagnose or to decide on major dietary restrictions without a plan for confirmation and nutrition.
This is typically a CLIA-validated laboratory immunoassay for allergen-specific IgE; results should be interpreted with your clinical history and are not a standalone diagnosis.
Order labs to measure Tomato (f25) IgE
from $29.49 at Quest Diagnostics.
Get this test with Vitals Vault
With Vitals Vault, you can order Tomato F25 IgE testing for yourself and complete your blood draw at a participating Quest location. This can be useful when you want objective data to bring to your clinician or when you are tracking whether an IgE signal changes over time.
After your results post, PocketMD can help you make sense of what “sensitization” means, how your number fits your symptoms, and which follow-up questions to ask (for example, whether you should consider component testing, a supervised food challenge, or an emergency action plan).
If your result suggests a broader pattern—such as multiple food triggers or coexisting asthma, eczema, or allergic rhinitis—you can use Vitals Vault to add companion labs so your clinician has a more complete picture rather than making decisions from a single data point.
- Order online and use a nationwide Quest draw network
- Clear, shareable results you can bring to your clinician
- PocketMD support for next-step questions and retest timing
Key benefits of Tomato F25 IgE testing
- 01Helps identify whether you are sensitized to tomato through an IgE pathway.
- 02Adds objective context when symptoms occur soon after eating tomato-containing foods.
- 03Supports safer decision-making about avoidance versus supervised confirmation testing.
- 04Can clarify whether mouth/throat itching may fit an oral allergy syndrome pattern.
- 05Helps your clinician assess risk when combined with reaction history and comorbid asthma.
- 06Provides a baseline value you can trend if your exposure or treatment plan changes.
- 07Makes it easier to plan targeted follow-up testing instead of broad, unfocused panels.
What is Tomato F25 IgE?
Tomato F25 IgE is a blood test that measures allergen-specific immunoglobulin E (IgE) antibodies directed at tomato proteins. IgE is the antibody class involved in immediate-type allergic reactions, where symptoms can start quickly after exposure.
A positive result means your immune system recognizes tomato and has produced IgE that binds to tomato allergens. This is called sensitization. Sensitization does not always equal a true clinical allergy, because some people have detectable IgE without reproducible symptoms when they eat tomato.
A negative result makes an IgE-mediated tomato allergy less likely, but it does not rule out every possible reaction to tomato. People can react through non-IgE mechanisms, and timing, preparation (raw vs cooked), and co-factors (exercise, alcohol, NSAIDs) can change how your body responds.
IgE allergy vs intolerance
IgE-mediated allergy typically causes rapid symptoms such as hives, swelling, wheeze, or vomiting, and it can be severe in some people. Intolerance is a broader term for non-immune reactions (for example, reflux triggered by acidic foods) and usually does not cause hives or airway symptoms. Your symptom pattern and timing are as important as the lab number.
Cross-reactivity and oral allergy syndrome
Some people react to raw fruits and vegetables because their immune system recognizes similar proteins shared with pollens (cross-reactivity). This can cause mouth or throat itching that is often milder and may improve with cooking. If this is your pattern, your clinician may interpret Tomato F25 IgE in the context of pollen allergies and other related foods.
What do my Tomato F25 IgE results mean?
Low
Low or undetectable Tomato F25 IgE
A low (or negative) result suggests you are not sensitized to tomato through an IgE pathway, which makes an immediate-type tomato allergy less likely. If you still have symptoms, your clinician may look at non-IgE causes such as reflux, food additive sensitivity, irritant effects, or other foods in the same meal. Rarely, testing can be negative even when allergy is present, so your history still matters—especially if you have had severe reactions.
Optimal
In-range Tomato F25 IgE (interpretation depends on the lab’s cutoffs)
Many labs report a numeric value with categories (such as “class” levels) rather than a single universal normal range. If your result falls near the lab’s decision threshold, it may represent low-level sensitization that may or may not cause symptoms. In this situation, your reaction history, how consistently tomato triggers symptoms, and whether reactions occur with raw versus cooked tomato often guide next steps more than the number alone.
High
High Tomato F25 IgE
A higher result increases the likelihood of clinically meaningful sensitization, but it still does not prove you will react every time or predict reaction severity by itself. Your clinician will weigh the result alongside the type of symptoms you have had, how quickly they occur, and whether you have asthma or a history of systemic reactions. If you have had concerning symptoms (trouble breathing, faintness, widespread hives), do not “test” the allergy at home—ask about supervised evaluation and an emergency plan.
Factors that influence Tomato F25 IgE
Your value can be influenced by cross-reactivity with pollens or related plant foods, which can raise IgE without causing severe reactions. Recent exposures do not usually cause immediate spikes the way some other labs do, but allergic disease activity over time can shift results. Medications like antihistamines generally do not change blood IgE results (they affect symptoms, not the antibody measurement), while immunotherapy or long-term changes in allergic inflammation may affect trends. Different labs and assay platforms can report slightly different numbers, so trending is most meaningful when you use the same lab method over time.
What’s included
- Tomato (F25) Ige
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Frequently Asked Questions
What does the Tomato F25 IgE test measure?
It measures the amount of IgE antibodies in your blood that bind to tomato allergens. This helps assess whether you are sensitized to tomato through an IgE-mediated allergy pathway.
Do I need to fast for a Tomato IgE blood test?
Fasting is not usually required for allergen-specific IgE testing. If you are getting other labs at the same time, follow the fasting instructions for the full set of tests you ordered.
Can a positive Tomato IgE mean I’m not actually allergic?
Yes. A positive result indicates sensitization, but some people have detectable IgE without consistent symptoms when they eat tomato. Your clinician may use your history and, in some cases, supervised oral food challenge to confirm whether it is a true clinical allergy.
Can antihistamines affect Tomato F25 IgE results?
Antihistamines typically do not change the IgE antibody level measured in your blood. They can reduce symptoms and may affect skin testing, but blood IgE testing is generally not altered by antihistamine use.
What’s the difference between Tomato IgE and food sensitivity (IgG) tests?
IgE testing is used to evaluate immediate-type allergic sensitization that can cause rapid symptoms like hives or swelling. IgG results are not considered diagnostic for food allergy and often reflect exposure rather than a harmful reaction pattern; your clinician can help decide which testing is appropriate for your symptoms.
When should I retest Tomato F25 IgE?
Retesting depends on your situation. If you are avoiding tomato due to suspected allergy, your clinician may consider repeat testing after a period of time to reassess risk, especially in children or if symptoms change. If you are trending results, try to use the same lab method and interpret changes alongside your clinical history.