Biotin can interfere with many laboratory tests—and lead to serious misdiagnosis

This article was first published on May 28, 2022. It was last reviewed, updated, or edited on January 8, 2024. Biotin is one of the B vitamins. It has become increasingly popular—by itself or along with other ingredients—as an over-the-counter product promoted for encouraging hair growth. It is also used as a treatment for some…