By Amy Norton
TUESDAY, Aug. 11, 2020 (HealthDay News) — A growing number of older people are turning to the vitamin biotin to fortify their aging skin, hair and nails.
But a new study shows how large doses of it can interfere with some vital medical tests.
Biotin, or vitamin B7, is an essential nutrient. And there is no issue with the lower doses found in multivitamins, said study author Danni Li, an associate professor of laboratory medicine and pathology at the University of Minnesota.
But high doses of biotin can cause falsely low results in a blood test that measures the protein troponin — which is used to help diagnose heart attacks. In 2017, the U.S. Food and Drug Administration issued a safety alert on the issue.
It hasn’t been clear, though, how popular high-dose biotin use is. So Li and her colleagues looked into the