Is it safe to discontinue prenatal vitamins that contain biotin for a few days during pregnancy when labs in particular thyroid tests are planned for treating hypo or hyperthyroidism in pregnancy?
Because, as we know, biotin can interfere with the accuracy of many lab test results, in particular thyroid labs.
2 Answers
Mednet MemberInvited Expert
Endocrinology · Emory University School of Medicine
Answered on
Biotin doses of 5-10 mg can impact TFTs. Most prenatal vitamins contain 30-35 mcg of biotin (although there are some that contain up to 500 mcg of biotin). This is usually too low to cause assay interference, so I do not recommend cessation of prenatal vitamins prior to TFTs (although I will ask tha...
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Mednet Member
Endocrinology · Village Medical Memorial Clinical Associates
Answered on
The quantity of Biotin is too small to cause any impact on thyroid tests.
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