*While the amount of usual dietary biotin intake is not expected to be high enough to affect these tests, biotin supplementation at doses greater than 1 mg per day can cause either falsely low or falsely high test results, depending on the analyte and platform used for testing.
*some multivitamin/mineral supplements have 1000+ mcg doses
* biotin supplements can easily have well over 1000+ mcg doses (300-10,000 mcg)
*many b-complex supplements can have 1000+ mcg doses
