This Vitamin May Interfere With Lab Test Results
The U.S. Food and Drug Administration (FDA) has issued a warning to the public, health care providers, medical lab personnel, and laboratory test developers that high levels of vitamin B7 (biotin) can interfere with certain medical tests and produce inaccurate results that may go undetected. B7 is commonly found in multivitamins and dietary supplements.
Biotin levels in dietary supplements promoting hair, skin, and nail benefits can be 650 times higher than the recommended daily intake of the vitamin. Supplements containing high levels of vitamin B7 may also be recommended for people with certain medical conditions, including multiple sclerosis (MS).
According to the FDA, biotin interference with lab results has been associated with a recent increase in reported adverse health events, including one death. Biotin in blood and other patient samples can cause falsely high or falsely low results, depending on the lab test, which can lead to misdiagnosis or inappropriate treatment. One example: A falsely low result for troponin caused by high levels of vitamin B7 could have serious implications, because troponin is a clinically relevant biomarker used to help diagnose heart attacks.