This test may exhibit interference when sample is collected from a person who is consuming a supplement with a high dose of biotin (also termed as vitamin B7 or B8, vitamin H, or coenzyme R).
It is recommended to ask all patients who may be indicated for this test about biotin supplementation. Patients should be cautioned to stop biotin consumption at least 72 hours prior to the collection of a sample.
Spin, separate and freeze
Transfer serum to a LabCorp screw-capped purple frozen plastic transport tube prior to freezing.
To avoid delays in turnaround time when requesting multiple tests on frozen samples, submit a separate frozen aliquot for each test requested.
Frozen (preferred) - 12 months
Freeze/thaw cycles: x1
Refrigerated - 24 hours
Electrochemiluminescence Immunoassay (ECLIA)