TITLE:
Ageing-Related Features of Hair and Scalp in Chinese Women by Clinical Evaluation Study
AUTHORS:
Sehyun Kim, Su Na Kim, Susun An, Jae Ho Yeon, Xuemin Wang, Li Li, Wei Lai, Hong Liang, Xinghua Gao, Wei Liu, Won Seok Park, Yongjoo Na
KEYWORDS:
Ageing, Hair, Scalp
JOURNAL NAME:
Journal of Cosmetics, Dermatological Sciences and Applications,
Vol.7 No.3,
September
23,
2017
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.