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

People start biotin and credit it when hair returns naturally. — Hanna Wickes, Miami Herald, 7 Oct. 2026

Hair vitamins, whether multis packed with biotin or standalone collagen supplements, promise to speed up hair growth and keep strands shiny and strong. — Nicole Catanese, InStyle, 25 Sep. 2026

They’re made with biotin and folic acid to help strengthen hair and nails. — Bestreviews, Chicago Tribune, 15 Sep. 2026

Adding this biotin supplement to cart will also put you just a dollar away from iHerb’s free shipping threshold, as all orders over $25 qualify for this indulgence. — Stacia Datskovska, Footwear News, 2 Sep. 2026

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