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

This formula contains niacinamide to help support hair and skin health, ashwagandha extract to soothe, and biotin to help strengthen hair and prevent breakage. —Andrea Navarro, Glamour, 29 Jan. 2026

Shitake mushroom extract contains biotin and iron to strengthen hair and improve elasticity. —Reece Andavolgyi, InStyle, 19 Jan. 2026

Hamburger Meat This popular barbecue option will provide you with some of the necessary biotin your body requires. —Cristina Mutchler, Verywell Health, 31 Dec. 2025

The formula is infused with biotin to support stronger, healthier hair over time, as well as coconut and babassu seed oils to replenish moisture and vitality in weak strands. —Jamie Allison Sanders, PEOPLE, 26 Dec. 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