654944 external_news 1643396386 1643396386 Recent social media posts raise concerns that taking too much biotin could lead to a false negative on a Covid-19 test. Biotin, or vitamin B7, is found naturally in some foods, yet there are also supplements available marketed for hair, skin and nail growth, which have recently become popular. But according to the FDA, some dietary supplements contain biotin levels up to 650 times the recommended daily amount. "Probably, this requires a really high level of ingesting biotin to be a problem," explained M.G. Finn, Professor and Chair in the School of Chemistry and Biochemistry, and James A. Carlos Family Chair for Pediatric Technology. "So a normal multivitamin won't have anywhere near that amount of that supplement in it so you don't have to worry there."

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