Raspberry Rf343 IgE (Allergy) Blood Biomarker Testing
It measures IgE antibodies to raspberry to help assess allergy risk and guide next steps, with convenient ordering and clear results through Vitals Vault/Quest.
With Vitals Vault, you have access to a comprehensive range of biomarker tests.
A Raspberry Rf343 IgE test is a blood test that looks for immune antibodies (IgE) that react to raspberry proteins. It is used to evaluate whether your immune system is sensitized to raspberry, which can be relevant if you have symptoms after eating it.
This test does not “prove” you will have a reaction every time you eat raspberry, and it does not measure intolerance. Instead, it adds one piece of evidence that your clinician can combine with your symptom history and, when appropriate, other allergy testing.
If you are trying to decide whether to avoid raspberry, whether you need an allergy referral, or whether your symptoms might be explained by a true food allergy pattern, this result can help you plan next steps more confidently.
Do I need a Raspberry Rf343 IgE test?
You might consider Raspberry Rf343 IgE testing if you notice repeat symptoms within minutes to a couple of hours after eating raspberry or foods that contain it. Common allergy-type symptoms include itching or swelling of the lips/mouth, hives, flushing, throat tightness, wheezing, coughing, vomiting, or lightheadedness. If you have ever had severe symptoms, treat that as urgent and discuss an emergency plan with a clinician.
This test can also be useful if you have pollen allergies and get mouth or throat itching with certain raw fruits (often called oral allergy syndrome or pollen-food allergy syndrome). In that situation, a positive IgE can support the idea of cross-reactivity, although the clinical history still matters most.
You may not need this test if your symptoms are delayed (many hours later), limited to bloating or nonspecific GI discomfort, or happen inconsistently without a clear pattern. Those situations can have many causes that are not IgE-mediated allergy.
Testing is most helpful when it supports clinician-directed care. Use your result to guide a conversation about risk, food challenges, and whether additional testing is appropriate, rather than to self-diagnose.
This is a laboratory-developed, CLIA-validated specific IgE blood test; results should be interpreted with your history and are not a standalone diagnosis of food allergy.
Lab testing
Order labs to measure Raspberry (rf343) IgE
from $29.49 at Quest Diagnostics
About 1 week
Schedule online — results typically within a week
Clear next steps
Guidance included, with follow-up care available
HSA / FSA
Eligible for pre-tax health spending accounts
Get this test with Vitals Vault
Vitals Vault lets you order Raspberry Rf343 IgE testing without needing to coordinate the logistics yourself. Once your blood draw is complete, you can review your result in a clear format and keep it on file for future comparisons.
If your result raises questions—like whether a low-positive value matters, whether cross-reactivity is likely, or what to test next—PocketMD can help you turn the number into an action plan you can bring to your clinician. That might include deciding on avoidance, discussing an epinephrine prescription if risk is higher, or choosing companion tests to clarify the picture.
If you are tracking a change over time (for example, after a period of avoidance or after other allergies are treated), Vitals Vault makes it straightforward to reorder and trend results in one place.
- Order online and complete your lab draw through the Quest network
- Results you can save, download, and trend over time
- PocketMD support for practical next-step questions
Key benefits of Raspberry Rf343 IgE testing
- Helps identify whether your immune system is sensitized to raspberry (specific IgE).
- Adds objective data when symptoms after raspberry are unclear or inconsistent.
- Supports risk discussions about immediate-type reactions versus non-allergic food symptoms.
- Helps guide whether you may benefit from broader food or pollen-related IgE testing.
- Can inform safer planning for reintroduction or supervised oral food challenge discussions.
- Provides a baseline value you can trend if your exposure pattern or symptoms change.
- Pairs well with PocketMD to translate a lab number into practical next steps.
What is Raspberry Rf343 IgE?
Raspberry Rf343 IgE is a “specific IgE” blood test that measures the amount of immunoglobulin E (IgE) antibodies in your blood that bind to raspberry proteins. IgE is the antibody class involved in immediate-type allergic reactions, which can include hives, swelling, wheezing, vomiting, and in rare cases anaphylaxis.
A positive result means your immune system has made IgE that recognizes raspberry. That is called sensitization. Sensitization increases the likelihood of allergy, but it is not the same thing as a confirmed clinical allergy. Some people have detectable IgE without reacting when they eat the food, while others react strongly even with relatively low levels.
Your clinician typically interprets this test alongside your reaction history, timing of symptoms, other allergies (especially pollen allergy), and sometimes additional tests such as other specific IgE foods, total IgE, or skin testing.
Sensitization vs. allergy
Sensitization means your immune system recognizes a food protein and has made IgE against it. Allergy means you reliably develop symptoms when exposed. The test supports the diagnosis, but your story—what happened, how quickly, and how reproducible it is—usually carries the most weight.
Why cross-reactivity can matter
Some fruit reactions are driven by cross-reactivity between pollens and related proteins in foods. In those cases, symptoms may be limited to mouth/throat itching with raw fruit and may improve when the fruit is cooked or processed. A raspberry IgE result can fit into that pattern, but it cannot confirm it by itself.
What do my Raspberry Rf343 IgE results mean?
Low Raspberry Rf343 IgE
A low or undetectable raspberry-specific IgE level makes an IgE-mediated raspberry allergy less likely, especially if your symptoms were mild or not clearly linked to raspberry. However, no blood test is perfect, and timing matters—if you were tested long after avoiding the food, IgE can decline. If you had convincing immediate reactions, your clinician may still consider additional evaluation such as skin testing or a supervised challenge.
In-range / negative Raspberry Rf343 IgE
Many labs report “negative” as below a cutoff value rather than an “optimal” range. A negative result generally supports that raspberry is not a major IgE trigger for you. If you still have symptoms, it may point you toward other causes such as non-IgE food reactions, reflux, infections, medication effects, or another food exposure in the same meal.
High Raspberry Rf343 IgE
A higher raspberry-specific IgE level indicates stronger sensitization and can increase the probability of true allergy, particularly if your symptoms occur quickly after exposure. The number alone does not predict reaction severity, so it should not be used to “grade” how dangerous a reaction will be. If you have had systemic symptoms (hives beyond the mouth, breathing symptoms, faintness, repetitive vomiting), discuss an allergy plan with a clinician and avoid self-testing exposures.
Factors that influence Raspberry Rf343 IgE
Your result can be influenced by your overall allergic tendency (atopy) and total IgE, which can make low-level positives more common. Recent exposures, long-term avoidance, and age can shift IgE levels over time. Cross-reactive pollen allergies can also contribute to positive results with milder, localized symptoms. Finally, different labs and methods can have slightly different cutoffs, so trending is most meaningful when you use the same lab network.
What’s included
- Raspberry (Rf343) Ige
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Frequently Asked Questions
Do I need to fast for a Raspberry Rf343 IgE blood test?
Fasting is not usually required for specific IgE testing. If you are combining this with other labs (like lipids or glucose), follow the fasting instructions for those tests.
What does a positive Raspberry IgE mean if I have never reacted to raspberries?
It can mean sensitization without clinical allergy. This is more common in people with other allergies or higher total IgE. Your clinician may recommend continued normal intake if you tolerate raspberry, or they may suggest a structured plan if your history is uncertain.
Can this test diagnose anaphylaxis risk?
No. The IgE level does not reliably predict reaction severity. Your past reactions, asthma control, and other clinical factors are more important for assessing risk and deciding whether you need an emergency action plan.
How long after an allergic reaction should I test IgE?
Specific IgE can be measured at most times, but if you are testing soon after a major allergic event, your clinician may time testing and follow-up based on your history. If you have avoided raspberry for a long time, IgE may decrease, which can make interpretation trickier.
Is Raspberry Rf343 IgE the same as a food intolerance test?
No. This measures IgE, which is tied to immediate-type allergy. Food intolerance is a broader term and often involves non-IgE mechanisms (for example, enzyme deficiencies or sensitivity to certain carbohydrates) that this test does not evaluate.
Should I also test total IgE or other foods?
Sometimes. Total IgE can provide context for low-level positives, and testing related foods may be helpful if you react to mixed fruit dishes or suspect multiple triggers. The best add-ons depend on your symptom pattern and other known allergies.
Can cooking raspberries change allergic reactions?
For some people with pollen-food allergy syndrome, heating can reduce symptoms because certain proteins are heat-labile. For others with true food allergy, cooking may not make the food safe. Do not test this on your own if you have had systemic reactions.