TestWell Price
$259.99
+ $6 lab processing fee
Biotin (vitamin B7) is a water-soluble B vitamin involved in fatty acid synthesis, glucose metabolism, and amino acid metabolism. It's widely taken as a supplement for hair, skin, and nail health. Important note: biotin supplementation can interfere with many other blood tests (including thyroid, cardiac, and hormone tests), so it should be discontinued before lab work.
Vitamin and nutrient testing identifies deficiencies that can drive fatigue, immune dysfunction, neurological symptoms, and long-term disease risk — and confirms that supplementation is working.
Anyone with restrictive diets (vegan, low-fat, low-carb), malabsorption conditions, fatigue, hair loss, mood changes, or currently supplementing and wanting to verify dosing.
Sample Type
Blood draw
Fasting
Not required
Results In
3–7 business days
Performed At
Quest
1 biomarker tested
Your Biotin (Vitamin B7) results will include values for each of the 1 biomarker tested, along with reference ranges. Results are reviewed by a licensed physician before being released to your secure portal.
If any values fall outside the normal range, your report will include guidance on what that may mean and recommended next steps. You'll receive an email notification when your results are ready, typically within 3–7 business days.
Typical reference range layout
Lab reports show where your value sits relative to established reference intervals—your physician interprets this in context for you.
Your Biotin (Vitamin B7) results will include values for each of the 1 biomarker tested, along with reference ranges. Results are reviewed by a licensed physician before being released to your secure portal.
If any values fall outside the normal range, your report will include guidance on what that may mean and recommended next steps. You'll receive an email notification when your results are ready, typically within 3–7 business days.
Typical reference range layout
Lab reports show where your value sits relative to established reference intervals—your physician interprets this in context for you.
Stop biotin supplements at least 72 hours before testing.
Stop biotin supplements at least 72 hours before testing.
TestWell Price
$259.99
+ $6 lab processing fee at checkout
No insurance needed · HIPAA compliant
Frequently ordered together
Customers who ordered Biotin (Vitamin B7) also added these for a more complete health picture.
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Biotin (Vitamin B7)
$259.99