What's this test for?

This test is ideal if you're experiencing ongoing diarrhea, bloating, or digestive discomfort that seems tied to what you eat. It helps figure out whether your body is having trouble absorbing certain carbohydrates or sugars, which can cause fluid to build up in your gut and lead to loose, watery stools. It's also useful if you've noticed patterns between eating things like dairy, sugar substitutes, or certain fruits and your symptoms.

What happens after I get my results?

Your results will show up in your account with your stool pH value and an explanation of what falls in the normal range versus what doesn't. If your pH is low, next steps often include cutting back on foods with sugars like lactose, fructose, or sugar alcohols to see if symptoms improve, then retesting later to check for changes. If your result points to something more serious, like a possible acid-base imbalance, the report will flag when it's a good idea to seek medical care right away. You can also track this result over time using the trends feature in your account to see how dietary changes affect your gut health.

What is stool pH and why does it matter?

Stool pH is a simple measurement of how acidic or alkaline your stool is, and it reflects what's happening in your digestive process. A lower (more acidic) pH often points to unabsorbed sugars or carbohydrates fermenting in your gut, which pulls in water and causes diarrhea. Tracking this number gives you a clue about whether diet changes, like cutting certain sugars, might ease your symptoms.

How can I naturally support healthy digestion?

Cutting back on sugar alcohols (like sorbitol and mannitol found in sugar-free gum and candy) and lactose can reduce symptoms if your gut struggles to absorb them. Eating smaller, more frequent meals and staying well hydrated also helps your digestive system process food more smoothly. Adding probiotic-rich foods like yogurt or kefir may support gut bacteria balance, but pay attention to how your body responds to dairy specifically.

When will I get my results?

Results are typically ready within about 7 days of your sample being processed at the lab. You'll get a notification once they're available in your account, so you can log in and review them at your convenience. The report will break down your value in plain language so you understand what it means for your digestion.

Who should consider this test?

This test is a good fit for anyone dealing with unexplained or recurring diarrhea, especially if it seems connected to eating certain foods. It's also worth considering if you suspect a sensitivity to sugars like lactose or fructose, or if you use sugar-free products containing sorbitol or mannitol regularly. People managing chronic digestive discomfort who haven't pinpointed a clear cause may also find this test helpful as a starting point.

What symptoms indicate I may need this test?

Watery, loose, or frequent diarrhea that seems to follow certain meals is a key symptom to watch for. Bloating, gas, and stomach cramps that show up after eating dairy, fruit, or sugar-free snacks can also be a sign. If these symptoms come and go depending on your diet, this test can help clarify what's going on.

What does a low stool pH mean?

A low, more acidic stool pH usually suggests that carbohydrates or sugars aren't being fully absorbed in your gut, and instead are being fermented by bacteria in your intestines. This fermentation process creates acids and pulls water into your gut, which is a common cause of loose, watery stools. Cutting back on suspected trigger foods, like dairy or artificial sweeteners, and watching for improvement is a practical first step.

What causes an abnormal stool pH?

Common causes include eating poorly absorbed sugars like sorbitol or mannitol (found in sugar-free products), lactose intolerance, or other issues with digesting certain carbohydrates. Some laxatives, especially those containing magnesium, can also throw off your stool pH. In more serious cases, conditions affecting the whole body, like severe infections or inflammation, can disrupt your body's normal acid-base balance.

How often should I retest?

If you're adjusting your diet to manage symptoms, retesting after a few weeks of changes can help confirm whether those changes are working. For ongoing or unexplained digestive issues, retesting every few months can help you track patterns over time. If your symptoms resolve completely, you likely won't need to retest unless new symptoms appear.

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.

Stool pH Test - Diarrhea & Digestion 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

[email protected]

Stool pH Test for Digestive and Diarrhea Issues

pH, Feces

Prescription & all lab fees included

Doctor's guidance included

Fast & convenient

Prescription & all lab fees included

Doctor's guidance included

Fast & convenient

What's this test for?

What happens after I get my results?

What is stool pH and why does it matter?

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

Find a lab near you

Stool pH Test for Digestive and Diarrhea Issues

Prescription & all lab fees included

Doctor's guidance included

Fast & convenient

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