biotin

noun

bi·​o·​tin ˈbī-ə-tən 

: a colorless crystalline growth vitamin C₁₀H₁₆N₂O₃S of the vitamin B complex found especially in yeast, liver, and egg yolk

Examples of biotin in a Sentence

Recent Examples on the Web

Both sulfur and biotin (a type of vitamin B) can be found in eggs. —Marie Bladt, Vogue, 13 June 2025

This Amazon choice product comes in a grape flavor, contains antioxidants and biotin, and reviews support impressive hair and nail growth. —Bestreviews, Chicago Tribune, 12 June 2025

At-home remedies include scalp massages with nutrient-rich topicals, as well as hair-specific supplements with biotin, zinc and collagen peptides. —Kaleigh Werner, Footwear News, 2 June 2025

Changes in nail texture may reflect nutritional deficiencies—including low levels of iron, biotin, zinc, magnesium, or vitamin B12—or systemic illnesses such as thyroid disorders, autoimmune diseases, or liver and kidney dysfunction. —Lydia Patrick, MSNBC Newsweek, 22 May 2025

Word History

Etymology

International Scientific Vocabulary, from Greek biotos life, sustenance; akin to Greek bios

First Known Use

1936, in the meaning defined above

Kids Definition

biotin

noun

bi·​o·​tin ˈbī-ə-tən 

: a growth vitamin of the vitamin B complex found especially in yeast, liver, and egg yolk

Medical Definition

biotin

noun

bi·​o·​tin ˈbī-ət-ən 

: a colorless crystalline growth vitamin C₁₀H₁₆N₂O₃S of the vitamin B complex found especially in yeast, liver, and egg yolk

called also vitamin H