Date F289 IgE (Date Fruit Allergy) Blood Biomarker Testing
It measures IgE antibodies to date fruit to help assess allergy risk, with convenient ordering and Quest lab collection through Vitals Vault.
With Vitals Vault, you have access to a comprehensive range of biomarker tests.
Date F289 IgE is a blood test that looks for allergy antibodies (IgE) directed at date fruit (Phoenix dactylifera). It does not “prove” you will react every time, but it helps estimate whether your immune system is sensitized to date.
This test is most useful when you have symptoms after eating date or foods that contain date (including some bars, syrups, and baked goods), or when you are trying to clarify a confusing history of reactions.
Because allergy decisions can affect safety and diet quality, your result is best interpreted alongside your symptoms and, when needed, other allergy tests and a clinician’s guidance.
Do I need a Date F289 IgE test?
You may want a Date F289 IgE test if you have had itching in your mouth or throat, hives, swelling, wheezing, stomach symptoms, or other allergy-type reactions after eating date fruit or products made with date. Sometimes the trigger is not obvious because date can appear as paste, syrup, or “natural sweetener” in packaged foods.
Testing can also be helpful if you have pollen allergies or latex sensitivity and notice symptoms with certain fruits, since cross-reactivity can make reactions feel unpredictable. If you have never eaten date but are worried because you reacted to related plants or have multiple food allergies, this test can be one piece of a risk assessment.
You usually do not need this test for general “food sensitivity” screening or vague symptoms without a consistent exposure pattern. A positive IgE result indicates sensitization, not certainty of clinical allergy.
If you have had a severe reaction (trouble breathing, fainting, or rapid swelling), treat that as urgent and work with a clinician on a safety plan. Lab testing supports clinician-directed care and does not replace medical evaluation or supervised food challenges when those are appropriate.
This is a laboratory specific IgE blood test typically performed in CLIA-certified labs; results should be interpreted with your history and are not a standalone diagnosis of food allergy.
Lab testing
Order Date F289 IgE testing through Vitals Vault and schedule your Quest draw
Schedule online, results typically within about a week
Clear reporting and optional clinician context
HSA/FSA eligible where applicable
Get this test with Vitals Vault
With Vitals Vault, you can order Date F289 IgE testing without waiting for a referral, then complete your blood draw at a nearby Quest location. Your report shows your measured date-specific IgE and the lab’s reference interpretation so you can discuss next steps with your clinician.
If your result is confusing or you are deciding what to do next (avoidance, retesting, or adding related allergens), PocketMD can help you turn the number into a practical plan and a short list of follow-up questions to bring to your appointment.
You can also use Vitals Vault to add companion allergy markers when you need broader context, such as total IgE or other specific IgE tests that match your exposure history.
- Order online and complete collection at a Quest draw site
- Clear, shareable results you can bring to your clinician
- PocketMD guidance for follow-up and retest planning
Key benefits of Date F289 IgE testing
- Helps determine whether your immune system is sensitized to date fruit (date-specific IgE).
- Adds objective data when your reaction history is unclear or exposures are hidden in packaged foods.
- Supports safer decision-making about avoidance versus supervised reintroduction with a clinician.
- Can guide whether you should test related allergens when cross-reactivity is suspected (for example, certain plant or latex-associated patterns).
- Helps explain oral allergy-type symptoms (itching/tingling in the mouth) versus non-allergic food intolerance patterns.
- Provides a baseline you can trend over time when monitoring changing allergy risk in children or adults.
- Pairs well with total IgE and other specific IgE tests to improve interpretation in clinical context.
What is Date F289 IgE?
Date F289 IgE is a “specific IgE” blood test. It measures the amount of immunoglobulin E (IgE) antibodies in your blood that bind to proteins from date fruit. When you are sensitized, your immune system has learned to recognize date proteins and may trigger allergy symptoms after exposure.
A key point is that sensitization is not the same as clinical allergy. Some people have measurable specific IgE but tolerate the food, while others react strongly with only modest levels. That is why your symptoms, timing, and exposure details matter as much as the lab value.
How this differs from a “food sensitivity” test
Specific IgE testing targets immediate-type allergy pathways that can cause hives, swelling, wheeze, vomiting, or anaphylaxis. It is different from unvalidated “IgG food panels,” which do not diagnose allergy and often reflect normal exposure.
Where date reactions can show up
Date is eaten whole and also used as paste, syrup, or sweetener in bars, smoothies, sauces, and baked goods. If your symptoms happen with multiple products but share date as an ingredient, a targeted IgE test can help narrow the suspect list.
Cross-reactivity and related plant allergens
Some people react because their IgE recognizes similar proteins across different plants. Cross-reactivity can contribute to oral itching with fruits or to broader patterns in people with pollen or latex sensitization. A date-specific IgE result can help decide whether additional targeted testing is worth doing.
What do my Date F289 IgE results mean?
Low or undetectable Date F289 IgE
A low or undetectable result makes an IgE-mediated date allergy less likely, especially if your symptoms were mild or inconsistent. It does not fully rule out allergy, because timing, recent avoidance, and individual immune patterns can affect results. If you had a convincing reaction, your clinician may still consider additional testing or a supervised oral food challenge.
In-range results (lab-specific reference)
Many labs report specific IgE as a numeric value with interpretation bands; “in range” often means below the lab’s positivity cutoff. If your value is near the cutoff, your history becomes even more important because borderline results can be harder to interpret. If you are currently avoiding date, your clinician may discuss whether and how to reintroduce it safely or whether to keep avoiding it based on your reaction risk.
High Date F289 IgE
A higher date-specific IgE level suggests stronger sensitization and can increase the likelihood of clinical allergy, particularly when your symptoms occur soon after eating date. However, the number alone cannot predict reaction severity, and it cannot tell you whether you will have anaphylaxis. If you have a high result and a compatible history, your clinician may recommend strict avoidance, an emergency action plan, and evaluation of related allergens.
Factors that influence Date F289 IgE
Your result can be influenced by age, overall allergic tendency (atopy), and whether you have high total IgE from eczema, asthma, or other allergies. Recent exposures do not usually cause day-to-day swings, but IgE patterns can change over months to years. Cross-reactivity with other plant allergens can sometimes produce a positive result even when date is tolerated, which is why symptom correlation is essential. Medications like antihistamines generally do not suppress blood IgE results (unlike some skin testing considerations).
What’s included
- Date (F289) Ige
Frequently Asked Questions
What does the Date F289 IgE test measure?
It measures the level of IgE antibodies in your blood that bind to proteins from date fruit. This helps assess whether you are sensitized in an IgE-mediated allergy pathway.
Does a positive Date IgE mean I am definitely allergic to dates?
Not necessarily. A positive result indicates sensitization, but true food allergy depends on whether you develop consistent symptoms after eating date. Your clinician may combine this result with your history and, in some cases, additional testing or a supervised food challenge.
Can this test predict how severe my reaction will be?
No. Higher values can increase the likelihood of clinical allergy, but IgE levels do not reliably predict reaction severity. Safety planning is based on your past reactions and clinical assessment, not the number alone.
Do I need to fast before a Date F289 IgE blood test?
Fasting is usually not required for specific IgE testing. If you are combining this with other labs (like lipids or glucose), follow the instructions for the full set of tests you are ordering.
How is this different from skin prick testing for date allergy?
This is a blood test measuring circulating date-specific IgE, while skin prick testing measures an immediate skin response to allergen exposure. Either can be useful, and your clinician may choose based on your history, medication use, and local availability.
When should I retest Date F289 IgE?
Retesting is typically considered when your clinical situation changes—such as after a period of avoidance, after reactions evolve, or when assessing whether an allergy may be improving over time. Many clinicians reassess on the order of months to a year rather than weeks, but the right timing depends on your history.
What other tests are helpful if my Date F289 IgE is positive?
Common companions include total IgE (to understand overall allergic tendency) and other targeted specific IgE tests based on your exposures and symptoms. If cross-reactivity is suspected, your clinician may recommend testing related plant allergens rather than broad, non-specific panels.