What's this test for?

This test is ideal if you're experiencing skin rashes, digestive issues, fatigue, or memory problems that could be linked to low niacin levels. It's also useful if you take high-dose niacin supplements and want to make sure your levels aren't too high, which can cause flushing, liver stress, or other side effects. Checking your Vitamin B3 status helps you understand if your diet or supplement routine is giving you the right amount.

What happens after I get my results?

Your results will show up in your account with your Vitamin B3 level clearly marked against the normal range so you know exactly where you stand. If your level is low, simple steps like eating more niacin-rich foods (chicken, fish, peanuts, whole grains) or adjusting your supplement intake can help; if it's high, cutting back on supplements is usually enough to bring it back down. You can download a standard lab report from your account at any time, and use the trends feature to track your Vitamin B3 level over time as you make changes.

What symptoms indicate I may need this test?

Common signs of low Vitamin B3 include skin that's red, scaly, or rash-prone, especially in sun-exposed areas, along with fatigue, digestive upset, and trouble concentrating. Severe deficiency can cause a condition called pellagra, which involves skin, digestive, and mental symptoms together. On the flip side, too much B3 from supplements can cause flushing, itching, or stomach discomfort, which is also worth checking.

How can I naturally support healthy Vitamin B3 levels?

Eating more niacin-rich foods like poultry, fish, peanuts, mushrooms, and whole grains is the easiest way to keep your levels balanced. Your body can also make some niacin from tryptophan, an amino acid found in protein-rich foods like eggs and dairy. If you're taking a niacin supplement, stick to the recommended dose since more isn't always better and can cause uncomfortable side effects.

When will I get my results?

Results are typically ready within about 7 days of your lab visit. Once processed, they'll be uploaded directly to your secure online account, and you'll get a notification so you can log in and review them right away.

Who should consider this test?

This test is a good fit for people with a limited diet, digestive conditions that affect nutrient absorption, or symptoms like skin rashes and unexplained fatigue. It's also useful for anyone taking niacin supplements at higher doses who wants to confirm they're staying in a healthy range. People managing cholesterol with prescription-strength niacin may also want to keep an eye on their levels.

What is Vitamin B3 and why does it matter?

Vitamin B3, also called niacin, is a nutrient your body needs to turn food into energy and to keep your skin, nerves, and digestive system working properly. It plays a role in over 400 chemical reactions in your body, which is why both too little and too much can cause noticeable problems. Getting the right amount supports steady energy, healthy skin, and normal brain function.

What does high Vitamin B3 mean?

A high result usually comes from taking niacin supplements in doses well above what you get from food. This can cause flushing, itching, stomach upset, or in some cases liver stress if it stays high for a long time. Cutting back on supplement dosage and rechecking your levels in a few months is a reasonable next step.

What does low Vitamin B3 mean?

A low result means your diet may not be providing enough niacin, or your body isn't absorbing it well due to a digestive condition. Adding more niacin-rich foods like chicken, fish, peanuts, and fortified grains can help raise your levels naturally. If symptoms like skin changes or fatigue are severe, seek medical care promptly since untreated deficiency can become serious.

How often should I retest?

If you're making dietary changes or adjusting a supplement, retesting after 2-3 months is a good way to see if your levels have improved. If your first result was normal and you don't have ongoing symptoms, retesting once a year or whenever new symptoms appear is usually enough.

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.

Vitamin B3 Test - Check Niacin Levels & Energy

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]