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Vitamin B7 Blood Test

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Vitamin B7, also referred to as Biotin, is necessary for metabolism and hormone production.

What is this test?

The Vitamin B7 Blood Test works by collecting a blood sample and measuring the levels of vitamin B7 within that sample. Your body does not produce B vitamins on its own. Biotin, and other B vitamins, are ingested through foods such as meat, fish, eggs, seeds, nuts, and certain vegetables (such as sweet potatoes, spinach, and broccoli), or through supplements. 


+$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

Quest test codes:

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  • 4. Get fast results online

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

Frequently asked questions

Your provider may order this test to screen for a vitamin B7 deficiency, malnutrition, or possible malabsorption disorders such as Celiac disease, Crohn’s disease, or cystic fibrosis. 

Your provider may wish to order a Vitamin B7 Blood Test if you’ve exhibited symptoms of B7 deficiency, including:  

  • hair loss
  • muscle pain
  • fatigue
  • a red rash around the eyes, nose, mouth, and genital area 

A Vitamin B7 Blood Test may also be ordered to monitor pregnant women or people with malabsorption disorders. You cannot take a Vitamin B7 Blood Test at home — this test can only be administered by a medical professional at a licensed testing facility. 

Once you receive the results of your test, you will need to consult with your provider. Only a medical professional can advise you on the results of your Vitamin B7 levels and help you develop a treatment plan if necessary. 

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 B7 deficiency at any age. It is rare for a healthy person eating a balanced diet to suffer from vitamin B7 deficiency.

There are no specific requirements to prepare for a Vitamin B7 Blood Test, but your provider may advise you to discontinue taking Biotin supplements for a few days before testing. Your provider will draw a blood sample from a vein in your arm. Vitamin B7 Blood Test results typically take 6-12 business days to process. 

The cost of a Vitamin B7 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. 

Tripment Health has partnered with nearly 7,000 lab test facilities across 48 states. Finding a Vitamin B7 Blood Test, current procedural technology (cpt) code 391, is easier than ever. Add the lab tests you need to your cart, then select a testing facility conveniently close to you. 

No, there are no fasting requirements for this test.