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

Proteins, vitamins, and minerals like biotin, iron, and omega-3s are all known to help keep nails strong. —Audrey Noble, Vogue, 5 Dec. 2025

The natural ingredients, like biotin and aloe vera, are gentle enough for sensitive skin, and there are no harsh chemicals. —Mike Winters, CNBC, 5 Dec. 2025

In beauty chains and drugstores, numerous oral hair-loss supplements containing ingredients such as biotin and vitamin A are displayed alongside shampoos and conditioners. —Yasmin Tayag, The Atlantic, 2 Dec. 2025

Featuring collagen, biotin and zinc, these once-daily ampoules aim to improve skin health and elasticity. —Noor Lobad, Footwear News, 19 Nov. 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