Biotin Interference On TSH And Free Thyroid Hormone Measurement

[paymanz]

it shows biotin supplement can disturb thyroid test,maybe better to not take it prior to testing thyroid.

Biotin interference on TSH and free thyroid hormone measurement. - PubMed - NCBI

Biotin interference
on measurement of TSH, fT4 and parathyroid hormone by
immunoassay has been reported.The recommendation in the
Cobas e601 TSH kit insert is that in patients receiving therapy
with high biotin doses (i.e., > 5 mg/day), no sample should be
taken until at least 8 hours after the last biotin administration.