Allergy, Brazil Nut Test: Booking, Price, and Results
About Allergy, Brazil Nut Test: Booking, Price, and Results
| Field | Value |
|---|---|
| Also Known As | Brazil Nut IgE Test, Brazil Nut-Specific IgE, f18 IgE Test, Para Nut Allergy Test |
| Sample Type | Serum (venous blood) |
| Fasting Required | No fasting required |
| Report Time | 3 days |
| Recommended For | All ages, individuals with suspected Brazil nut allergy or existing tree nut allergies |
| Price | Starting at ₹1,300 |
What Is an Allergy, Brazil Nut Test?
The brazil nut allergy test is a blood test that measures the level of specific immunoglobulin E (IgE) antibodies in your blood. IgE antibodies are produced by the immune system when it mistakenly treats Brazil nut proteins as a threat. The test is used to confirm or rule out a Brazil nut allergy and is also known as the brazil nut-specific IgE or f18 IgE test. A small blood sample is all that is needed.
What Does a Allergy, Brazil Nut Test Measure?
This test looks for specific proteins in your blood that indicate an allergic response to Brazil nuts. Below are the key components assessed.
| Component | What It Indicates |
|---|---|
| Brazil nut-specific IgE antibodies | Shows whether your immune system has reacted to Brazil nut proteins |
| Ber e 1 component (reflex testing) | A storage protein in Brazil nuts; sensitisation to it is linked to whole-body (systemic) allergic reactions |
Why Is an Allergy, Brazil Nut Test Done?
Doctors order this test to investigate allergic symptoms that may be triggered by Brazil nuts or to assess allergy risk in people who have had reactions to tree nuts.
Common Symptoms That May Require This Test
The following symptoms may prompt a doctor to recommend the allergy brazil nut test:
- Itching or tingling in the mouth, tongue, or throat
- Swelling of the lips, face, or area around the eyes
- Red, raised, itchy rash (hives or urticaria)
- Vomiting, nausea, abdominal pain, or diarrhoea
- Difficulty breathing or a hoarse voice
- Dizziness, feeling faint, or confusion
- Pale, clammy skin
Conditions This Test Can Help Detect
This test can assist in identifying several allergy-related conditions. These include:
- Confirmed allergy to Brazil nut proteins
- Identification of the specific allergen responsible for symptoms
- Investigation following a suspected anaphylactic episode
- Cross-reactivity with other tree nuts such as hazelnut, cashew, pistachio, and almond
- Confirmation of sensitisation before starting immunotherapy (allergy desensitisation treatment)
How to Prepare and What to Expect
No special preparation is needed for this test. Here is what you should know before your appointment.
Do You Need to Fast?
No, fasting is not required. You can eat and drink normally before this test. Recent consumption of Brazil nuts does not affect the result, and no dietary changes are needed beforehand.
Practical Tips Before Your Test
Keep the following points in mind before your sample is collected:
- Bring a detailed clinical history including your symptoms, previous test results, and family history, as this is required for the test
- Inform your doctor about any medications, supplements, or vitamins you are currently taking
- Drink plenty of water before the test, as good hydration makes the blood draw easier
- Wear clothing with loose or rolled-up sleeves to give easy access to your arm
Step-by-Step Procedure
Here is what to expect during the allergy brazil nut test procedure:
- A trained phlebotomist will ask you to sit comfortably and extend your arm.
- The inside of your elbow is cleaned with an antiseptic solution.
- A small needle is inserted into a vein to draw approximately 3 ml of blood.
- You may feel a brief, mild sting when the needle goes in or out.
- The blood is collected into a gel tube, and the whole process typically takes under five minutes.
- The sample is labelled and sent to the laboratory under refrigerated conditions for testing.
Factors That Can Affect Accuracy
Several factors may influence the accuracy of your result:
- Markedly elevated total serum IgE levels (above 2,500 kU/L) may cause a false-positive result due to nonspecific binding
- Cross-reacting proteins from other plant sources such as cottonseed, sunflower, or sesame may produce a positive reading
- Certain antihistamines and immunosuppressant medicines may alter results
- Prior immunotherapy treatment can affect IgE levels and make results harder to interpret
Understanding Your Allergy: Brazil Nut Test Results
Your results will show IgE levels measured in kU/L, grouped into classes from 0 (negative) to 6 (very high). Your doctor will use these results alongside your symptoms and clinical history.
| Class | Result Range | Interpretation |
|---|---|---|
| 0 | less than 0.10 | Negative |
| 0/1 | 0.10 – 0.34 | Borderline / Equivocal |
| 1 | 0.35 to 0.69 | Equivocal |
| 2 | 0.70 to 3.49 | Positive |
| 3 | 3.50 to 17.49 | Positive |
| 4 | 17.50 to 49.99 | Strong positive |
| 5 | 50.0 to 100 | Strong positive |
| 6 | Greater than 100 | Strong positive |
Results at Class 2 or above (0.70 kU/L or more) are flagged as abnormally elevated. A negative result does not completely exclude a clinically relevant allergic response upon exposure to Brazil nuts.
These ranges are general guidelines. Your doctor will interpret your results based on your age, health history, and other factors. Always consult a qualified healthcare professional for personalised medical advice.
Results During Special Conditions
Certain factors can complicate the interpretation of your result:
- Very high total serum IgE (above 2,500 kU/L) may trigger false-positive readings due to nonspecific binding of antibodies.
- Immunological cross-reactivity between Brazil nuts and other tree nuts (hazelnut, cashew, pistachio, and almond) means a positive result may reflect sensitivity to a related nut rather than Brazil nuts specifically.
- Proteins from plant sources such as cottonseed, sunflower, rapeseed, castor bean, and sesame share similarities with Brazil nut proteins and may contribute to a positive reading.
How to Maintain Healthy Levels
If your results indicate a Brazil nut allergy, the following general steps can help you manage your health:
- Avoid Brazil nuts and all products that may contain them, including certain baked goods, chocolates, and cosmetics — always read ingredient labels carefully.
- Inform family members, restaurants, and food providers about your allergy so they can take precautions when preparing food for you.
- Speak to your doctor about carrying an epinephrine auto-injector if you have a confirmed allergy, as this is a standard safety recommendation.
Lupin Diagnostics Allergy, Brazil Nut Price and Home Collection
The allergy brazil nut test cost at Lupin Diagnostics starts at ₹1,300, and home collection is available across multiple cities in India.
| City | Approximate Price (₹) |
|---|---|
| BHOPAL | 1300 |
| CHENNAI | 1300 |
| HYDERABAD | 1300 |
| KOLKATA | 1300 |
| NAVI MUMBAI | 1300 |
| PUNE | 1300 |
Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
Home Collection
Lupin Diagnostics offers a brazil nut allergy test home collection across cities in India, making it easy to get tested without visiting a centre. All samples are processed in NABL-accredited laboratories by trained professionals. Your digital report is delivered directly to you once ready.
How to Book
Booking your allergy brazil nut test online is straightforward:
- Select the test on the Lupin Diagnostics website.
- Choose your city and preferred time slot.
- Opt for home sample collection by a certified phlebotomist, or visit your nearest Lupin Diagnostics centre.
- Receive your report via email or WhatsApp within the stipulated turnaround time.
Frequently Asked Questions
The allergy brazil nut test measures IgE antibodies in your blood that the immune system produces when it reacts to Brazil nut proteins. It helps confirm or rule out a Brazil nut allergy and can identify whether Brazil nuts are the trigger behind allergic symptoms you have been experiencing.
No fasting is required. You can eat and drink as normal before the test. Eating Brazil nuts before the test will not affect your results.
Symptoms usually appear within minutes of contact with Brazil nuts, though they can sometimes take up to two hours to develop. Common reactions include itching, swelling, hives, and digestive upset.
Yes. Brazil nut allergy can cause serious reactions. Along with peanuts and shellfish, tree nuts are among the food allergens most commonly linked to anaphylaxis, a rapid and serious allergic reaction. Anyone with a confirmed allergy should speak to their doctor about an appropriate emergency plan.
Tree nut allergies tend to be lifelong. Fewer than 10 percent of people with a tree nut allergy outgrow it. Regular monitoring under a doctor's guidance is advisable, especially for children.
Being allergic to one tree nut increases your likelihood of being allergic to others. Immunological cross-reactivity has been documented between Brazil nut, hazelnut, cashew, pistachio, and almond. Your doctor may recommend avoiding all tree nuts based on your test results and clinical history.
A positive result means your blood contains IgE antibodies to Brazil nut proteins, indicating sensitisation. However, a positive result alone is not a definitive diagnosis. Your doctor will consider your symptoms, clinical history, and possibly further tests before confirming an allergy diagnosis.
Allergy, Brazil Nut Test: Booking, Price, and Results
