Safety of Food Containing 5000 mg of Collagen Peptide and Its Effect on Hair in Healthy Female Subjects: A Double-Blind, Placebo-Controlled Study January 2008 in “ Aesthetic dermatology ” Norimitsu Saito, Tamura Takaaki, Morikawa Reiko, Kunihiko Kurihara, Kensei Katsuoka We don't know much about this study yet. We're maintaining the world's largest resposity of hair loss research. You can help out the community by sending a PDF of this study here . Not sure how to get a study's PDF? You can email the authors of the study. View this study on jglobal.jst.go.jp →