Biotin Blood Test | Biotin Deficiency Test (Vitamin B7) | Quest®

Biotin (Vitamin B7) Test

This test can help determine the level of biotin (vitamin B7) you have in your blood. Biotin is a water-soluble vitamin that helps your body break down proteins, carbohydrates, and fats into energy. Biotin also allows cells to communicate with one another and tell genes what to do. Read more

Test details

Sample type:

Blood

Preparation:

You do not need to do anything special to prepare for the sample collection. Avoiding supplements containing biotin for 72 hours prior to collection is preferred.

Test type: In Person

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$79.00

+ $6.00 Physician Service Fee

Quantity

About the Test

This biotin blood test can help determine the amount of biotin (vitamin B7) you have in your blood. Biotin is a water-soluble vitamin that helps your body break down proteins, carbohydrates, and fats into energy. Biotin also allows cells to communicate with one another and tell genes what to do.

Identifying and addressing nutrient deficiencies are important steps toward better health. Your body does not produce most vitamins and minerals, so you must get them from food or supplements. How nutrients work in your body is influenced by more than just what you eat. These factors include genetics, age, health conditions, medications, metabolism, and how well your body absorbs nutrients.

Buy your own biotin deficiency test online with Quest. No doctor’s visit is required – simply purchase biotin testing, visit a nearby Quest® location for sample collection, and get fast results.

This test may be right for you if you are concerned about not getting enough biotin from your diet and/or supplements, or are experiencing symptoms that suggest a biotin deficiency (see Signs & Symptoms section below).

This test gives you and your healthcare provider information about your biotin (vitamin B7) levels.

This Biotin (vitamin B7) Test measures the level of vitamin B7, also known as biotin, in your blood. Biotin is a water-soluble vitamin that helps your body break down proteins, carbohydrates, and fats into energy. Biotin also allows cells to communicate with one another and tell genes what to do. Not having enough biotin may increase your risk for depression, brittle nails, thinning hair, a rash around the eyes, nose, or mouth, or pinkeye.

Signs and symptoms of low biotin include:

Brittle nails
Fatigue
Trouble sleeping
Feelings of sadness or depression
Hair loss (alopecia)
Scaly, red rash around eyes, nose, and mouth
Pink eye (conjunctivitis)
Skin infections
Tingling of arms and legs
Nausea and vomiting

You must be 18 years of age or older to purchase a test on questhealth.com. Purchases not permitted in: AK, AZ, HI.

You do not need to do anything special to prepare for the sample collection. Avoiding supplements containing biotin for 72 hours prior to collection is preferred.

After you provide your specimen, it generally takes up to 7-10 business days to process and release your test results. However, processing times may vary. Your test results will be available in a clear and easy-to-read report. Independent physicians are available to discuss questions or concerns you may have regarding your results.

How it works

questhealth.com offers 100+ consumer-initiated Quest Diagnostics lab tests to empower you to have more control over your health journey. Choose from a variety of test types that best suit your needs.

Buy a lab test & schedule an appointment

No doctor visit required for purchase. Book a visit to one of 2000+ Quest locations.

Schedule an appointment

Visit Quest for sample collection

Complete your test sample collection during your scheduled appointment.

Get fast results online

Access results online as soon as they’re available.

View results

Get physician support

Discuss your results with an independent physician at no extra cost.

FAQs

Would taking supplements be helpful if I am biotin deficient?

If your body is not absorbing certain nutrients properly, your doctor may suggest you consider taking a supplement for that nutrient.

While it is unlikely to get too much of a nutrient if you are taking a supplement, getting too much, known as toxicity, is possible. It's recommended to confirm a deficiency through testing and talk with your doctor prior to taking supplements.

What’s the difference between water-soluble and fat-soluble vitamins?

Water-soluble and fat-soluble vitamins differ in how they are absorbed by the human body.

A water-soluble vitamin dissolves in water and is easily absorbed by the body. Your body does not store these vitamins for long, so any extra will be eliminated in your urine. Because of this, it's important to consume them every day.

A fat-soluble vitamin dissolves in fats and oils and is absorbed with the fats you eat. Your body stores any extra in your liver or fatty tissues. Because of this, you don't need to consume them every day.

Can I use my FSA or HSA funds to purchase tests on questhealth.com?

You may be able to use your FSA or HSA funds to purchase lab tests at questhealth.com. Please review your FSA/HSA plan or check with a tax professional to confirm specific requirements for individual eligibility.

Our references

1. Saleem F, Soos MP. Biotin Deficiency. [Updated 2023 Feb 20]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2024 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK547751
2. National Institutes of Health. Biotin. Accessed October 31, 2024. https://ods.od.nih.gov/factsheets/Biotin-HealthProfessional/

Tests purchased on questhealth.com are only for individuals who intend to pay directly for testing and do not want to submit a claim for reimbursement under their health insurance.

Biotin (Vitamin B7) Test