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

In addition to vitamin B7 (biotin), the supplements include marine collagen peptides to help strengthen and hydrate, adaptogenic ashwagandha to calm stress hormones’ effects on hair growth, and saw palmetto, which combats thinning by reducing the hair-thinning hormone DHT. —Emily Orofino, Vogue, 29 June 2025

My hairbrush was starting to look a little too full this past year, so my hairstylist told me to consider investing in one of the best biotin shampoos. —Neha Tandon, Glamour, 26 June 2025

Infused with hair-loving ingredients like biotin, plant collagen, caffeine, and niacinamide, and fragranced with the brand’s signature scent: Cote D’azur. —Annie Blackman, Allure, 5 June 2025

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