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

Shoppers say this product, which includes ingredients like biotin, honey, and rose, is a game changer for length retention. —Robyn Merrett, StyleCaster, 20 May 2025

Nail hygiene habits like shaping and filing regularly, applying moisturizer, taking a biotin supplement, and refraining from picking at your cuticles are key for keeping your nails healthy and strong. —Cristina Mutchler, Verywell Health, 18 Feb. 2025

Look for nutrients like biotin and panthenol to nourish the hair. —Bestreviews, Chicago Tribune, 31 Jan. 2025

The treatment is formulated with superstar ingredients like rosemary, mint, and biotin, which thoroughly nourish the scalp to promote healthier skin and hair growth, according to our testers. —Clara McMahon, People.com, 1 May 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