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

Caffeine supports healthy follicle function, biotin promotes keratin production, peptides reinforce the hair fiber, and moisturizing panthenol softens hair and soothes dryness. — Christa Joanna Lee, Allure, 20 Aug. 2026

Avoid excessive buildup and use products with growth actives like biotin. — Rebecca Norris, InStyle, 16 Aug. 2026

Made with biotin, shea butter, and beeswax, the mascara was formulated to mimic the nourishing, strengthening effects of a lash serum. — Micaela English, Glamour, 14 Aug. 2026

Even supplements such as Nutrafol contain biotin which can elevate hormone levels, so the sisters are careful and consult with their physicians. — Laura Trujillo, USA Today, 30 June 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