Essential 4 health!: As a vitamin, by definition biotin is an essential nutrient. While deficiency is uncommon, low biotin can cause hair loss, dermatitis, and skin rash, ataxia, seizures, and other neurologic dysfunctions. High doses can be helpful for skin and hair health as well as blood sugar regulation. See http://draxe.com/biotin-benefits/ and http://lpi.oregonstate.edu/mic/vitamins/biotin for details.
Answered 6/16/2016
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