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

With rosemary, mint and biotin, the formula helps promote a healthy scalp and makes hair supple and shiny. —Ariel Wodarcyk, Glamour, 29 May 2026

Ingredients like Bifida and Lactobacillus ferments support the scalp environment, while caffeine, biotin, niacinamide, and salicylic acid refresh buildup-prone roots and keep scalps feeling balanced. —Christa Joanna Lee, Allure, 27 May 2026

Infused with biotin, rosemary, and peppermint oil, this ultra-popular Mielle Organics shampoo strengthens thin, brittle strands. —Isabel Bekele, InStyle, 26 May 2026

Finally, biotin strengthens the hair shaft and stimulates keratin production, thickening the hair. —Claire West, PEOPLE, 21 May 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