Patient should discontinue taking Biotin, Vitamin B7, or Vitamin H 48 hours before getting blood drawn.
* This volume does not allow for repeat testing
Protect from light by placing in an opaque plastic bag immediately after collection
Avoid hemolysis
Specimen must be frozen if testing is delayed
> 4.5 ng/mL
Patients taking vitamin supplements containing high doses of biotin (> 5 mg/day) may have falsely increased test results generated.
Excessive light exposure may alter Vitamin B12 and Folate values.
Same Day/1 to 2 days
01423973
82746
Recommended as outpatient testing only