One 5 mL gold (SST) top tube.

1 mL serum ambient (Min: 0.5 mL).

* Collection Instructions *

• Dietary supplements containing biotin may interfere in assays and may skew analyte results to be either falsely high or falsely low.
• For patients receiving the recommended daily doses of biotin, draw samples at least 8 hours following the last biotin supplementation.
• For patients on mega-doses of biotin supplements, draw samples at least 72 hour following the last biotin supplementation.

Ambient: 7 days

Refrigerated: 14 days

Frozen: 30 days

• Gross hemolysis
• Grossly lipemic
• Plasma