What's this test for?

This test is ideal if you're experiencing digestive discomfort, bloating, skin issues, or other symptoms you suspect might be linked to a food sensitivity. It checks whether your immune system reacts to yeast, a common ingredient found in bread, beer, wine, and many processed foods. If you've noticed a pattern between eating yeast-containing foods and feeling unwell, this test can help you understand what's going on.

What happens after I get my results?

Your results will show up in your account with your yeast IgG level and a clear explanation of what's considered a normal range. If your level comes back elevated, a simple next step is to try removing yeast-containing foods from your diet for a few weeks and see if your symptoms improve, then consider retesting later to track changes. You can download a standard lab report anytime from your account, and if you test again in the future, the trends feature lets you compare results side by side to see how things change over time.

What symptoms indicate I may need this test?

Common signs include bloating, gas, stomach cramps, diarrhea or constipation, skin rashes, brain fog, and fatigue that seem to show up after eating bread, alcohol, or fermented foods. Some people also notice recurring headaches or joint discomfort tied to certain meals. If these symptoms show a pattern with your diet, this test can help clarify whether yeast sensitivity is a contributing factor.

How can I naturally support a yeast sensitivity?

Try cutting back on obvious yeast sources like bread, beer, wine, and aged cheeses for a few weeks to see if symptoms ease. Eating more whole, unprocessed foods and adding probiotic-rich foods like plain yogurt or fermented vegetables (in moderation) can help support a balanced gut. Staying hydrated and reducing added sugars, which can feed yeast overgrowth in the gut, is also a helpful everyday habit.

When will I get my results?

Results are typically ready within about 7 days of your lab visit. Once processed, they'll be posted directly to your secure online account, and you'll be able to view and download your report as soon as it's available.

Who should consider this test?

Anyone who regularly experiences digestive upset, skin flare-ups, or unexplained fatigue after eating yeast-containing foods may want to consider this test. It's also useful for people who've already tried eliminating other common food triggers without relief and want to check yeast specifically. If you suspect a connection between your diet and how you feel but haven't pinpointed the cause, this test offers a data-driven starting point.

What is a yeast IgG reaction and why does it matter?

IgG is a type of antibody your immune system makes when it reacts to something you eat repeatedly, in this case, yeast. Unlike an immediate allergic reaction, an IgG response tends to build up over time and can be linked to ongoing, low-grade symptoms rather than sudden ones. Understanding this reaction matters because it can point you toward specific dietary changes that may ease chronic discomfort.

What does a high yeast IgG result mean?

A high result means your immune system shows an elevated antibody response to yeast, which some people associate with digestive or skin symptoms after eating yeast-containing foods. It doesn't mean you have a dangerous allergy, but it does suggest yeast might be worth limiting in your diet to see if symptoms improve. Pairing this with a food and symptom journal can help you confirm the connection.

What causes a high yeast IgG level?

Frequent, repeated exposure to yeast in foods like bread, beer, wine, and baked goods is the most common driver of an elevated IgG response. An imbalanced gut environment, where yeast organisms are allowed to overgrow, can also contribute. Diets high in sugar and refined carbs may make this more likely, since sugar can fuel yeast growth in the gut.

How often should I retest?

If you make dietary changes based on your first result, waiting about 8-12 weeks before retesting gives your body enough time to show a meaningful change. If symptoms resolve and you're not reintroducing yeast-heavy foods, you may not need to retest often. Retesting is most useful when you want to confirm that dietary changes are actually lowering your antibody response.

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.

Yeast IgG Test - Food Sensitivity Screening

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

[email protected]

Yeast IgG Food Sensitivity Blood Test

Yeast (f45) IgG

Prescription & fees included

Easy to understand results

Fast & convenient

Prescription & fees included

Easy to understand results

Fast & convenient

What's this test for?

What happens after I get my results?

What symptoms indicate I may need this test?

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

Find a lab near you

Yeast IgG Food Sensitivity Blood Test

Prescription & fees included

Easy to understand results

Fast & convenient

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