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The Library of Congress “Everyday Mysteries: Why Does Hair Turn Gray?”
Tsippora Shainhouse, MD, dermatologist, Beverly Hills and Long Beach, CA; clinical instructor, University of Southern California.
Harvard Medical School: “Why Does Hair Turn Gray?”
Indian Journal of Dermatology Venereology and Leprology: “Premature Graying of Hair.”
Indian Dermatology Online Journal: “Smokers' hair: Does smoking cause premature hair graying?”
Diana Gallegos, editorial fashion hair expert, Twist, Cut, Extend, San Francisco.
Andrew Fitzsimons, celebrity stylist, Los Angeles; Alterna Haircare brand ambassador.
Stephanie Johnson, hair stylist, Studio Fusion, Dallas.
Rochelle Graham-Campbell, hair expert, Fort Myers, FL; co-founder & CEO, Alikay Naturals hair care.
Richard Drews, expert colorist; co-owner, White Lodge Studios Salon, Seattle.
Reviewed by Stephanie S. Gardner, MD on December 22, 2017
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