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Vitamin B3 (Niacin) Test

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Vitamin B3, or niacin, plays an important role in maintaining a healthy digestive system, nervous system, and skin.

What is this test?

Vitamin B3, also known as niacin, is an essential vitamin that plays a vital role in supporting the nervous system and digestive system, and also promotes healthy skin. Niacin also assists in converting food into energy, and improves circulation and cholesterol levels. 

What is a Vitamin B3 Blood Test?

The Vitamin B3 Blood Test works by collecting a blood sample and measuring the levels of vitamin B3 within that sample. Your body does not produce B vitamins on its own. Niacin, and other B vitamins, are ingested through foods such as meat, fish, eggs, poultry, nuts, and leafy greens, or through supplements. 

Why would my doctor order a Vitamin B3 Blood Test?

Your provider may order this test to screen for a vitamin B3 deficiency, malnutrition, malabsorption, carcinoid tumors, or possible liver diseases such as cirrhosis.

When should I order a Vitamin B3 Blood Test?

You might order a Vitamin B3 Blood Test if you’ve exhibited symptoms of B3 deficiency, including:  

  • Pellagra, a disease causing a red rash, diarrhea, and mental impairment
  • swollen mouth and bright red tongue
  • fatigue
  • disorientation and/or memory loss 

You cannot take a Vitamin B3 Blood Test at home — a vitamin B3 lab test can only be administered by a medical professional at a licensed testing facility. 

How do I read the results of the test?

Once you receive the results of your Vitamin B3 Blood Test, you will need to consult with your provider. Only a medical professional can advise you on the results of your vitamin B3 levels and help you develop a treatment plan if necessary. 

Do my results change with age?

People with health conditions that impact how the body absorbs nutrients, or who are on certain medications, can be at risk of developing a vitamin B3 deficiency at any age. It is rare for a healthy person who eats a balanced diet to suffer from a vitamin B3 deficiency.

What should I expect at my appointment?

There are no specific requirements to prepare for a Vitamin B3 Blood Test, but your provider may advise you to discontinue taking Niacin supplements for a few days before testing. Your provider will draw a blood sample from a vein in your arm. Vitamin B3 Blood Test results typically take 2-6 business days to process. 

How much does a test cost?

The cost of a Vitamin B3 Blood Test listed on Tripment Health is transparent and final – you will never be asked to pay additional fees at the testing facility, or receive a surprise bill down the road. 

Where can I find an affordable Vitamin B3 Blood Test near me?

Tripment Health has partnered with nearly 7,000 lab test facilities across 48 states. Finding a Vitamin B3 Blood Test, current procedural technology (cpt) code 91029, is easier than ever. Add the lab tests you need to your cart, then select a testing facility conveniently close to you. 


Can taking niacin help you pass a drug test? 

While there are several products on the market that claim that niacin supplements can help you pass a drug test by flushing toxins out of your body, there is no scientific evidence to support this claim. In fact, taking too much niacin can damage your liver and lead to niacin overdose, which is considered a medical emergency. 


+$15 service fee

Price does not include the Physician Service Fee ($6) and the Lab Collection Fee ($9). These non-refundable fees cover the ordering and oversight of lab tests and follow-up services when appropriate.

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Provided by Quest Diagnostics

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  • 2. Pay online

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  • 3. Go to the lab

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  • 4. Get fast results online

    We will email you when results are ready, in 1–3 business days

Lab tests FAQs

No. At Tripment Health, we focus on providing transparent healthcare services to uninsured or under-insured individuals. We’ve negotiated prices directly with lab test facilities to make diagnostic lab panels available to individuals who would rather pay directly than go through a private or government-sponsored insurance carrier.

No. By purchasing a blood panel, you will not be able to submit any claim, bill, or other request for reimbursement to any insurer, third-party payer, or Government health program. However, you can use your FSA or HSA card.

You will receive a payment confirmation email, then an additional email confirming your appointment details (type of test, time and location of appointment, and QR code). You will need to present your QR code to the testing facility in order to check in.

Once your test is complete, you will receive your results within 1-3 business days.

With a blood panel, you can establish your body’s baseline values for basic health measurements like cholesterol (total, triglycerides, HDL, LDL and total cholesterol/HDL ratio), glucose and hemoglobin A1c. Additionally, depending on the blood panel you choose, you will receive data on performance measurements such as Vitamin D, Vitamin B12, Magnesium, Thyroid Stimulating Hormone, and/or Testosterone.


Your results are more than just numbers. Your results come with a personalized recommendation from one of our physicians.

No. One of our physicians will order the panels for you.

You must be 18 or over to be able to get tested.

Currently we have local patient service centers available in all states, except in NY, NJ, TX & RI.