bi·​o·​tin | \ ˈbī-ə-tən How to pronounce biotin (audio) \

Definition of biotin

: 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

That’s got your biotin, your collagen, your glutamine, your niacinamide. Roxanne Adamiyatt, Town & Country, "What Does a Pre-Oscars Facial Really Entail?," 23 Feb. 2019 Aside from helping the body process fats and sugars, oral biotin is important for regulating hair and nail growth. Allure, "The Skin-Care Glossary: A Comprehensive Guide to Everything You Need to Know," 17 Aug. 2018 Fans sympathized in the comments and offered up suggestions, ranging from biotin supplements to collagen powder. Korin Miller, SELF, "Jessie James Decker Is Dealing with Postpartum Hair Loss," 10 Aug. 2018 This Allure Best of Beauty winner contains witch hazel and biotin in addition to a soothing blend of peppermint, spearmint, and tea tree oil, all of which work in tandem to calm an itchy, irritated scalp. Kaleigh Fasanella, Allure, "How to Use Witch Hazel on Acne-Prone Skin, According to Dermatologists," 10 May 2018 Additional amounts of magnesium, B-complex vitamins, B-12, biotin, glutathione, zinc and anti-nausea drug Zofran are also barreling through my bloodstream. Craig Hlavaty, Houston Chronicle, "Feeling the drip, drip, drip of the mobile IV craze," 13 June 2018 For clarity’s sake, Lash Slick has vegan biotin, but is not totally vegan. Shannon Barbour, The Cut, "Why Glossier Is Refunding Everyone Who Bought Its Mascara Today," 9 May 2018 Plus, the ingredient amounts differed by 20 percent or more compared to what was on the label, including containing 70 percent more biotin than claimed. Cheryl Wischhover, Vox, "Vitamins for your hair, nails, and skin are everywhere on Instagram. Don’t fall for them.," 9 Apr. 2018 Vegan biotin allegedly conditions, making lashes softer and shinier over time. Shannon Barbour, The Cut, "Glossier’s First Mascara Is Out Today," 9 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'biotin.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of biotin

1936, in the meaning defined above

History and Etymology for biotin

International Scientific Vocabulary, from Greek biotos life, sustenance; akin to Greek bios

Keep scrolling for more

Learn More about biotin

Statistics for biotin

Last Updated

4 Mar 2019

Look-up Popularity

Time Traveler for biotin

The first known use of biotin was in 1936

See more words from the same year

Keep scrolling for more

More Definitions for biotin


bi·​o·​tin | \ ˈbī-ət-ən How to pronounce biotin (audio) \

Medical Definition of biotin

: a colorless crystalline growth vitamin C10H16N2O3S of the vitamin B complex found especially in yeast, liver, and egg yolk

called also vitamin H

More from Merriam-Webster on biotin Encyclopedia article about biotin

Comments on biotin

What made you want to look up biotin? Please tell us where you read or heard it (including the quote, if possible).


a flaw that causes the downfall of a hero

Get Word of the Day daily email!

Test Your Vocabulary

A Green Quiz

  • shamrock
  • What is the best definition of green-eyed monster?
True or False

Test your knowledge - and maybe learn something along the way.


Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!