Journal of Cosmetics, Dermatological Sciences and Applications, 2017, 7, 245-257 http://www.scirp.org/journal/jcdsa ISSN Online: 2161-4512 ISSN Print: 2161-4105 DOI: 10.4236/jcdsa.2017.73023 Sep. 25, 2017 245 J. Cosmetics, Dermatological Sciences and Applications Ageing-Related Features of Hair and Scalp in Chinese Women by Clinical Evaluation Study Sehyun Kim 1 , Su Na Kim 1 , Susun An 1 , Jae Ho Yeon 2 , Xuemin Wang 3 , Li Li 4 , Wei Lai 5 , Hong Liang 6 , Xinghua Gao 7 , Wei Liu 8 , Won Seok Park 1* , Yongjoo Na 1* 1 AMOREPACIFIC Corp, R&D Center, Gyeonggi-do, South Korea 2 AMOREPACIFIC Corp, Shanghai R&I Center, Shanghai, China 3 Skin & Cosmetic Research Department, Shanghai Skin Disease Hospital, Shanghai, China 4 Department of Dermato-Venereology, West China Hospital, Sichuan University, Chengdu, China 5 Department of Dermatology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China 6 Department of Dermatology, Renmin Hospital of Wuhan University, Wuhan, China 7 National Key Department of Dermatology and Venereology, The First Hospital of China Medical University, Shenyang, China 8 Department of Dermatology, The General Hospital of Air Force, Beijing, China Abstract There are previous studies of ageing hair and scalp in Caucasians and some Asians, such as Koreans and Japanese. However, the characteristics of scalp and hair have not yet been studied in Chinese, the largest population in the world, especially in terms of ageing. The purpose of this study is to investigate ageing features in Chinese women’s hair and scalp. Methods: In total, 1343 women in China aged 20 to 65 participated in this research. Hair density and diameter were measured and analysed with Folliscope®. Hair color and scalp conditions such as dandruff and erythema were evaluated through micro- scopic images. Measuring equipment was also used to detect scalp water con- tent, barrier function and sebum secretion. Results: Hair density decreased gradually with ageing, while hair diameter peaked at 40s. The color of hair became bright with ageing because of gray hair and color fading. The degree of scalp sebum and dandruff was higher at younger ages. Interestingly, scalp erythema became more severe with ageing. Conclusion: This study shows the physical and physiological changes of Chinese women’s hair and scalp. Most aging features (hair diameter, scalpsebum contents, dandruff and erythema) were noticeable in their 40s, but hair density began to decline in their 30s. This first study of aging hair and scalp in Chinese women would be helpful for understanding the ageing phenomenon and development of hair and scalp care products. Keywords Ageing, Hair, Scalp How to cite this paper: Kim, S., Kim, S.N., An, S., Yeon, J.H., Wang, X.M., Li, L., Lai, W., Liang, H., Gao, X.H., Liu, W., Park, W.S. and Na, Y. (2017) Ageing-Related Features of Hair and Scalp in Chinese Women by Clinical Evaluation Study. Journal of Cosmetics, Dermatological Sciences and Applications, 7, 245-257. https://doi.org/10.4236/jcdsa.2017.73023 Received: August 10, 2017 Accepted: September 18, 2017 Published: September 25, 2017 Copyright © 2017 by authors and Scientific Research Publishing Inc. This work is licensed under the Creative Commons Attribution International License (CC BY 4.0). http://creativecommons.org/licenses/by/4.0/ Open Access