Ageing-Related Features of Hair and Scalp in Chinese Women by Clinical Evaluation Study

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.

Evaluation of Scalp Hair Density and Diameter in the Arab Population: Clinical Office-Based Phototrichogram Analysis

“…9 A study conducted on Chinese women showed that the reduction in hair diameter reached its peak in the 40s age range. 17 In our study, the highest reduction in hair diameter was found among individuals older than 50 years. However, a full comparison cannot be made, as the Chinese study was conducted on females only.…”

Avaliação clínica, histológica e laboratorial do envelhecimento cutâneo na suplementação oral de coenzima Q10 em idosas

“…Alterações da estrutura vascular, inflamação e vasodilatação são clinicamente manifestados como eritema, uma vez que ocorre aumento anormal da hemoglobina na derme papilar (Xu et al, 2016). O eritema, por sua vez, está fortemente associado ao envelhecimento da pele do rosto e do couro cabeludo, surgindo por volta dos 20 anos de idade e intensificando-se a partir de 40 anos (Kim et al, 2017). Além disso, eritema e telangiectasia são relevantes manifestações de fotoenvelhecimento (El Kahky; Diab; Ali, 2018).…”