Patient should discontinue taking Biotin, Vitamin B7, or Vitamin H 48 hours before getting blood drawn.
* This volume does not allow for repeat testing
Specimen should be drawn at least 4 hours after IV Dose or 6 hours after oral dose. Optimal time is 12 - 24 hours after oral dose.
0.9 - 2.0 ng/mL
High: > 2.5 ng/mL
Patients taking vitamin supplements containing high doses of biotin (>5 mg/day) may have falsely increased test results generated.
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