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Originally called vitamin H, biotin has been recognized as a micronutrient since 1927.—Sarah Garone, Health, 22 Dec. 2023 Biotin, a B vitamin also known as vitamin H, is known for its hair and nail growth benefits.—Amber Smith, Discover Magazine, 10 Aug. 2023 Biotin is a common name for vitamin B7 or vitamin H and is required to produce the hair protein keratin.—Sydney Poe, chicagotribune.com, 4 Mar. 2021
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