Why Private MD Labs?
90-day money-back guarantee Lab order in minutes Save a trip to the doctor Low prices since 2005 Labs within 2 miles
Sample image
Sample report
Walnut IgG allergy test for identifying hidden food sensitivities causing digestive discomfort

Blood Test for Walnut Sensitivity and Digestive Issues

Walnut (f256) IgG

Google
3,138 reviews
  • Pinpoint walnut allergies causing discomfort
  • Reveal hidden triggers for digestive issues
  • Clarify unexplained symptoms with precision
First results as soon as overnight*

90 day happiness guarantee

We stand behind our service

Prescription & fees included

Go directly to the lab, no extra fees

Easy to understand results

With friendly doctor's notes & guidance

Fast & convenient

Lab visit as quick as 10 mins in & out

90 day happiness guarantee

We stand behind our service

Prescription & fees included

Go directly to the lab, no extra fees

Easy to understand results

With friendly doctor's notes & guidance

Fast & convenient

Lab visit as quick as 10 mins in & out

What's this test for?

This test is ideal if you're experiencing unexplained digestive issues, bloating, stomach discomfort, or other symptoms that you suspect might be related to eating walnuts. It helps identify if your body is producing IgG antibodies in response to walnut proteins, which may indicate a food sensitivity. Many people use this test when they notice certain symptoms appear after consuming walnuts or foods containing walnuts but want concrete answers.

How should I prepare for this test?

No special preparation is required for this test. You don't need to fast, and you should continue eating your normal diet, including walnuts if you regularly consume them. The test measures your existing antibody levels, so maintaining your usual eating habits will provide the most accurate results about how your body currently responds to walnuts.

What's included in this test?

Walnut (f256) IgG

This test measures your IgG antibody response specifically to walnut proteins. IgG antibodies are part of your delayed immune response, which means symptoms might not appear immediately after eating walnuts but can develop hours or even days later. This makes it particularly useful for identifying hidden food sensitivities that aren't detected by traditional IgE allergy tests, helping you connect persistent symptoms to walnut consumption.

What happens after I get my results?
You'll receive detailed doctor notes in simple language explaining what your walnut IgG antibody levels mean for your symptoms and overall health. These notes include personalized recommendations like elimination diet strategies, alternative nut options, or whether you should consider further allergy testing. You'll also get the standard lab report and can track your antibody levels over time using our trends feature to see how dietary changes affect your immune response.
When will I get my results?
Most IgG food sensitivity tests are processed within 5-7 business days after your blood sample reaches the laboratory. You'll receive an email notification as soon as your results are ready, and you can access them immediately through your secure online account along with the detailed doctor notes explaining what your levels mean.
Who should consider getting this test?
This test is ideal for people who experience digestive discomfort, bloating, headaches, fatigue, or skin issues that they suspect might be triggered by walnuts. It's also helpful for those with known nut sensitivities who want to determine if walnuts specifically are a problem, or anyone following an elimination diet who wants to identify food triggers scientifically.
What symptoms indicate I may need this test?
Common symptoms that suggest a possible walnut sensitivity include bloating, gas, stomach cramps, diarrhea, or nausea that occur after eating. You might also experience headaches, fatigue, brain fog, skin rashes, joint pain, or general inflammation. If you notice these symptoms appearing regularly but can't pinpoint the cause, testing for walnut IgG antibodies can help identify if walnuts are contributing to your discomfort.
How can I manage walnut sensitivity naturally?
If your test shows elevated IgG antibodies to walnuts, try eliminating walnuts and walnut-containing foods from your diet for 4-6 weeks to see if symptoms improve. Replace walnuts with alternative nuts like almonds, cashews, or seeds like sunflower or pumpkin seeds if they don't trigger your symptoms. Focus on healing your gut with probiotic-rich foods, bone broth, and anti-inflammatory foods like leafy greens and fatty fish. Always read food labels carefully, as walnuts can hide in baked goods, granolas, and salad toppings.
What is IgG food sensitivity and how is it different from an allergy?
IgG food sensitivity is a delayed immune response that develops hours to days after eating a trigger food, while IgE allergies cause immediate reactions within minutes. IgG sensitivities typically cause less severe but chronic symptoms like digestive issues, fatigue, and inflammation, whereas IgE allergies can cause severe reactions like hives, throat swelling, or anaphylaxis. Understanding your IgG response helps identify foods that may be causing ongoing discomfort without triggering obvious allergic reactions.
How often should I retest my walnut IgG levels?
If you've eliminated walnuts from your diet, consider retesting after 3-6 months to see if your antibody levels have decreased. If you're working on gut healing and plan to reintroduce walnuts, testing before reintroduction can provide a baseline to compare against. For ongoing monitoring or if symptoms persist despite dietary changes, annual testing can help track your immune response and guide your dietary decisions.
How’s this work?
Getting your blood test with us is easy, private & backed by the power of science.

Long story short:
  1. In the test options, use the filters or search box to narrow your choices and find the test you want.
  2. If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test.
  3. Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout.
  4. If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want.
  5. When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system.
  6. Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way.
  7. You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy!
  8. If you have any questions, please text us at 754-799-7833 or email [email protected] and we'll gladly help you.
How do I know which test to get?
In the test options, find the test you want. If you’re not sure which test to get, we can lend a hand in finding the right option.

Just text or call us at 754-799-7833, email us at [email protected], and we'll gladly help you. We've got your back and reply quickly.
Is it possible to make changes to my lab order if I made a mistake with the name, date of birth, or any other details?
Absolutely! We totally understand that errors can happen. No worries, we're here to help you.

Just reach out to us via text at 754-799-7833 or shoot us an email at [email protected]. Remember to include your order number and let us know the correct information you’d like to update. Our awesome team will jump right in and make sure everything is sorted out and accurate for you.

There are no changes necessary if your address is wrong on the requisition though. We don’t mail anything out.

Our lab requires an address to be listed to generate an order.
Do you accept health insurance?
Only HSA & FSA is accepted.

Our services are strictly self-pay and cannot be submitted to your health insurance provider except for Health Savings Accounts or Flexible Savings Accounts.

This policy applies to all insurance companies, including federal health insurance programs like Medicare.

If you have any questions, please text us at 754-799-7833 or email [email protected].
Can I cancel my order?
Yes.

We get it – sometimes your needs change.

As long as your samples haven’t been collected yet, we’re happy to help you cancel your order.

If you have any further questions, please text us at 754-799-7833 or email [email protected].

You can read more about our cancellation policy here.
How can I find a lab location near me?
During the ordering process, you’ll be able to select a specific lab near you, with no strings attached! You can switch it up later easily and visit any of our authorized locations as long as it’s the same lab company you selected your test for (Quest Diagnostics or Labcorp).

Before you proceed with your order, feel free to browse through all our lab locations here. This will give you the peace of mind of knowing that there's a lab nearby your home, office or your favorite gym.

If you have any questions, please text us at 754-799-7833 or email [email protected] and we'll gladly help you.

Here’s why 1,000,000+ customers chose us for affordable hassle-free private blood testing.

You get clinical lab reports & simplified health insights.
Save time & gas, go straight to the lab. Our doctors cover the rest.
Results start landing the next day after your lab visit.*
We don’t sell or share your data. Your time & privacy matter.
US-licensed doctors have your back if things get unclear.
No hidden fees, nice discounts for regular checkups.
Save a trip to the doctor, go directly to the lab
Instant orders, results often overnight*
Results explained in simple language
Reviewed by US licensed doctors
Fast & confidential, we never sell or share your data
No insurance needed, transparent pricing
Demo results
Walnut (f256) IgG 4.8 U/mL
Demo results
Normal < 2.0 Elevated ≥ 2.0
4.8 U/mL

What this means

Your IgG antibody levels to walnut are elevated, suggesting your immune system is reacting to walnut proteins. This delayed immune response may be contributing to digestive discomfort, bloating, or other chronic symptoms you've been experiencing after consuming walnuts or walnut-containing foods.

* Regular blood test results (e.g., CBC) typically start arriving the next business day after sample collection. More complex tests, such as hormone panels, may take up to 10–15 business days due to their complexity.
Here’s how easy it is to get blood work done on your terms
Choose a checkup
Order your test Save a trip to the doctor. Your results will come with clear, friendly explanations. Takes 2 minutes
Book a lab
Book an appointment Visit any of our 4,000 nearby lab locations to have your samples collected. Book or walk-in
Choose a checkup
Get results Receive a clear, easy-to-digest health report by email & SMS within a few business days. Get answers, fast

Blood Test for Walnut Sensitivity and Digestive Issues

Google
3,138 reviews
  • Pinpoint walnut allergies causing discomfort
  • Reveal hidden triggers for digestive issues
  • Clarify unexplained symptoms with precision

1,000,000+ blood tests later, here's what our customers say

Google reviews 3138 reviews Next
Still got questions? Text our super-cool support team at 754-799-7833 to get help finding your ideal checkup.