Should I stop taking biotin before blood work? Healthcare practitioners may advise their patients to discontinue taking biotin supplements a few days before having lab tests done. The FDA will continue to monitor reports of adverse events of biotin interference with immunoassays and will update the public if significant new information becomes available.
What blood tests does biotin interfere with? Biotin can affect a wide variety of laboratory tests. Examples include tests for: Troponin—a test used to help diagnose heart attacks. Thyroid hormone tests, such as thyroid stimulating hormone (TSH), thyroxine (T4) and triiodothyronine (T3) tests.