Ageing-Related Features of Hair and Scalp in Chinese Women by Clinical Evaluation Study
- 1 AMOREPACIFIC Corp, R&D Center, Gyeonggi-do, South Korea
- 2 AMOREPACIFIC Corp, R&D Center, Gyeonggi-do, South Korea
- 3 AMOREPACIFIC Corp, R&D Center, Gyeonggi-do, South Korea
- 4 AMOREPACIFIC Corp, Shanghai R&I Center, Shanghai, China
- 5 Skin & Cosmetic Research Department, Shanghai Skin Disease Hospital, Shanghai, China
- 6 Department of Dermato-Venereology, West China Hospital, Sichuan University, Chengdu, China
- 7 Department of Dermatology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
- 8 Department of Dermatology, Renmin Hospital of Wuhan University, Wuhan, China
- 9 National Key Department of Dermatology and Venereology, The First Hospital of China Medical University, Shenyang, China
- 10 Department of Dermatology, The General Hospital of Air Force, Beijing, China
- 11 AMOREPACIFIC Corp, R&D Center, Gyeonggi-do, South Korea
- 12 AMOREPACIFIC Corp, R&D Center, Gyeonggi-do, South Korea
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 microscopic images. Measuring equipment was also used to detect scalp water content, 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.
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