Patient should discontinue taking Biotin, Vitamin B7, or Vitamin H 48 hours before getting blood drawn.
1.0 mL Plasma in a PST Mint Green Top Tube - Li Heparin (preferred)
or
1.0 mL Serum in a SST Gold Top Tube
1.0 Serum in a SST Gold Top Tube
or
1.0 mL Serum from a Red Top Tube in a Plastic Vial
or
1.0 mL Plasma from a Green Top Tube - Li Heparin in a Plastic Vial
2 days Refrigerated
24 hours unspun
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.
0.2 mL
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.
01483951
80162