What's this test for?

This test is ideal if you're experiencing unexplained weight loss, chronic diarrhea, bloating, or greasy, foul-smelling stools that won't go away. It helps figure out if your body is properly digesting and absorbing protein, which can point to problems with your pancreas, intestines, or overall nutrient absorption. It's often used when malabsorption is suspected but the cause isn't yet clear.

What's included in this test?

This test measures the total amount of nitrogen in a stool sample, which reflects how much protein your body is failing to digest and absorb. Because protein breakdown produces nitrogen, higher-than-normal levels in stool usually mean your digestive system isn't processing protein efficiently, which can be a sign of malabsorption or pancreatic issues.

What happens after I get my results?

Your results will show up in your account with the normal range clearly explained next to your value, so you can see right away if your nitrogen level is within the expected range. If your result is elevated, simple next steps like adjusting your diet, staying hydrated, and improving digestion habits are usually a good starting point, while very high or unexpected values may call for prompt medical attention. You can download the standard lab report directly from your account at any time, and if you retest in the future, the trends feature lets you track changes over time to see if your digestion is improving.

How can I naturally support healthy digestion and nutrient absorption?

Eating smaller, more frequent meals can ease the workload on your digestive system and help your body absorb nutrients better. Foods rich in digestive enzymes, like pineapple, papaya, and fermented foods such as yogurt or kimchi, may support better protein breakdown. Staying well hydrated and reducing high-fat, greasy foods can also help calm symptoms like bloating and loose stools. Gentle exercise and stress reduction techniques, like walking or deep breathing, can further support healthy gut function.

When will I get my results?

Results are typically ready within about 7 days of your sample being received at the lab. You'll get a notification as soon as your report is available in your account, so there's no need to check repeatedly.

Who should consider this test?

This test is a good fit for anyone dealing with ongoing digestive symptoms like chronic diarrhea, unexplained weight loss, or stools that appear oily or unusually bulky. It's also useful for people who have been told they might have a malabsorption issue and want a clearer picture of how well their body handles protein. Athletes or individuals on high-protein diets who notice digestive changes may also find this test helpful.

What symptoms indicate I may need this test?

Common symptoms include chronic loose or greasy stools, unexplained weight loss, persistent bloating, gas, and fatigue that doesn't improve with rest. Some people also notice muscle wasting or weakness, which can happen when the body isn't absorbing enough protein. If these symptoms have lasted more than a few weeks, this test can help clarify what's going on.

What is fecal nitrogen and why does it matter?

Fecal nitrogen is a marker that reflects how much protein is left undigested in your stool instead of being absorbed by your body. Since protein is essential for muscle repair, immune function, and overall energy, high levels of nitrogen loss can signal that your digestive system isn't working as efficiently as it should. Tracking this helps identify problems with digestion or absorption early, before they lead to bigger nutritional deficiencies.

What does a high fecal nitrogen result mean?

A high result means more protein than normal is passing through your digestive system without being broken down and absorbed. This is often linked to conditions affecting the pancreas, small intestine, or overall digestive efficiency. It's a good idea to look at your diet, consider reducing hard-to-digest fats, and monitor for other symptoms like weight loss or fatigue.

How often should I retest?

If your first result is normal and you have no ongoing symptoms, retesting isn't usually necessary unless new symptoms appear. If you're actively working on improving digestion through diet or lifestyle changes, retesting in 2-3 months can help you see if those changes are making a difference. Anyone with a significantly abnormal result should consider retesting sooner to track progress.

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.

Fecal Nitrogen Test - Protein Absorption 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]

Fecal Nitrogen Test for Protein Digestion Issues

Nitrogen, Total, 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's included in this test?

What happens after I get my results?

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

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Fecal Nitrogen Test for Protein Digestion Issues

Prescription & all lab fees included

Doctor's guidance included

Fast & convenient

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