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

Mohapi explains that a good growth spray, typically formulated with ingredients like caffeine, biotin, and peptides, can help stimulate circulation and support the follicle before the hair even breaks the surface. —Iman Balagam, Vogue, 6 Apr. 2026

While there’s a lot of hype around biotin supplements for hair growth there just isn’t enough science to back it up. —Rebecca Strong, USA Today, 3 Apr. 2026

To top it off, the serum includes hyaluronic acid, biotin, and niacinamide to keep your scalp calm, hydrated, and thriving, so your hair can live its best, fullest life. —Kansas City Star, 27 Mar. 2026

Beyond the capixyl, the formula includes hyaluronic acid, biotin, and niacinamide to keep your scalp calm, hydrated, and thriving, so your hair can live its best, fullest life, as Allure puts it. —Miami Herald, 26 Mar. 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