The Effect of Combined Intake of Enzyme Foods and Collagen on the Scalp and Hair of Middle-Aged Women Aged 40-60 April 2015 in “ 한국미용학회지 ” 황지영, 김병곤, 강상모 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 dspace.kci.go.kr →