Does biotin mess up blood work? Biotin in blood or other samples taken from patients who are ingesting high levels of biotin in dietary supplements can cause clinically significant incorrect lab test results.
Can biotin cause anemia? Biotin in supplements can also affect tests for heart failure, pregnancy, cancer, and iron-deficiency anemia. Experts say the problem is not new. “In the lab community, people have known about this for a long time,” said Danni Li, PhD, director of clinical chemistry at the University of Minnesota Medical Center.
When should I stop taking biotin before a blood test? IF your laboratory test is not urgent: Since biotin is relatively rapidly eliminated from the bloodstream after ingestion, it is recommended that you stop taking biotin at least 8 hours before the scheduled blood test.
Related Questions
How long does it take for biotin to get out of your system?
Your doctor also can advise you on whether you should stop taking your supplement ahead of an upcoming lab test. Most water-soluble vitamins flush out of your body in 24 to 48 hours, but it might take longer depending on the dose you’re taking.