Popular beauty supplement can lead to life-threatening misdiagnoses

You can find them at any grocery or drug store, bottles and bottles of biotin. It's an essential vitamin we all need and, in recent years, has become a popular supplement many women take to improve their hair, skin and nails. "While biotin is not toxic or harmful, per say, to the body, it can lead to misdiagnosis," said Dr. Saleh Aldasouqui, chief of endocrinology at Michigan State University.