What's this test for?

This test is ideal if you're experiencing bloating, stomach pain, skin issues, or fatigue that seems to show up after eating corn or corn-based products. It measures your immune system's IgG4 response to corn, which can help you figure out if corn might be quietly triggering your symptoms. Many people don't connect food sensitivities to everyday issues like headaches, joint aches, or digestive trouble, so this test offers a simple way to check.

What's included in this test?

This test measures IgG4 antibodies specific to corn, which is a marker of delayed immune reactions some people have to specific foods. Unlike immediate allergic reactions, IgG4 responses tend to show up hours or even days after eating, which makes them harder to notice on your own and more useful to test for directly.

What happens after I get my results?

Your results will show up in your online account with a clear explanation of what a normal versus elevated IgG4 level means. If your level is elevated, a practical next step is trying an elimination approach, cutting corn and corn-derived ingredients from your diet for a few weeks and noting whether your symptoms improve. You can download a standard lab report anytime from your account, and if you retest down the road, the trends feature lets you track how your levels change over time.

How can I naturally support digestive health if I'm sensitive to corn?

If your results suggest a corn sensitivity, start by reading ingredient labels closely, since corn shows up in many processed foods as corn syrup, cornstarch, or maltodextrin. Focus on whole, unprocessed foods like fresh vegetables, lean proteins, and gluten-free grains such as rice or quinoa instead. Adding probiotic-rich foods like yogurt or fermented vegetables can also help support your gut while you adjust your diet.

When will I get my results?

Results are typically ready within about 7 days of your lab visit. Once they're ready, you'll be notified and can log into your account to view and download your full report.

Who should consider this test?

This test is a good fit for anyone who regularly eats corn or corn-derived ingredients and deals with unexplained digestive discomfort, skin flare-ups, or low energy. It's also useful if you've already tried cutting out common allergens like dairy or gluten without relief and want to check another common trigger. People managing chronic conditions like eczema, IBS symptoms, or migraines sometimes find this test helpful for narrowing down triggers.

What symptoms indicate I may need this test?

Common signs include bloating, gas, stomach cramps, diarrhea, or constipation that happens after eating corn products. Some people also notice skin reactions like rashes or eczema flare-ups, joint pain, brain fog, or fatigue. Because these reactions can be delayed by hours or days, it's often hard to connect the dots without testing.

What does a high Corn IgG4 result mean?

A high result means your immune system is producing more antibodies to corn proteins than typical, which may be linked to the symptoms you've been noticing. This doesn't mean you have a dangerous allergy, but it's a signal worth acting on by reducing corn in your diet and watching how your body responds. Keeping a simple food and symptom journal during this time can help you confirm the connection.

How often should I retest?

If you make dietary changes based on your results, retesting after 8-12 weeks can help you see whether your IgG4 levels have gone down along with your symptoms. If you're not making changes, retesting once every year or so is a reasonable general guideline. Retest sooner if new symptoms show up after reintroducing corn into your diet.

What should I do if my results are abnormal?

Start with a straightforward elimination diet, removing corn and corn-derived ingredients for a few weeks while tracking your symptoms in a journal. If you notice improvement, try reintroducing corn slowly to see if symptoms return, which helps confirm the sensitivity. If your symptoms are severe or persistent even after dietary changes, seek medical care to rule out other causes.

Getting your blood test with us is easy, private & backed by the power of science.Long story short: In the test options, use the filters or search box to narrow your choices and find the test you want. 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. 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. 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. 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. 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. You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy! If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com 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 support@privatemdlabs.com, and we'll gladly help you. We've got your back and reply quickly.

When will my lab results be available?

Most test results will be available within 1–3 business days. Once they're ready, we'll send an email and text message to let you know. After your blood draw, just hang tight and don't worry – we'll keep you updated and in the loop! If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com, and we'll gladly help you.

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 support@privatemdlabs.com. 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 support@privatemdlabs.com.

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 support@privatemdlabs.com. 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 support@privatemdlabs.com and we'll gladly help you.

Corn IgG4 Test - Food Sensitivity Check

Getting your blood test with us is easy, private & backed by the power of science.

Long story short:

In the test options, use the filters or search box to narrow your choices and find the test you want.
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.
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.
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.
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.
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.
You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy!

754-799-7833

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