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 populat...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.展开更多
With the exception of conditions such as dandruff, interest in the scalp is relatively low. However, when we consider the scalp as part of the skin, interesting observations can be made. The average amount of sebum se...With the exception of conditions such as dandruff, interest in the scalp is relatively low. However, when we consider the scalp as part of the skin, interesting observations can be made. The average amount of sebum secretion in the scalp varies depending on sex. Several studies show differences in scalp characteristics among races, but in some cases, these are difficult to find. The scalp has a weaker barrier function than does facial skin. The reason for the weak barrier function is unclear, but it is necessary to consider the effect of dandruff on the scalp. Growth of dandruff-related bacteria weakens the barrier. However, strengthening the barrier suppresses dandruff. In other words, there is an interdependency between scalp bacteria and skin, which is important for the maintenance of scalp barrier homeostasis. Anxiety regarding a sensitive scalp is as high as that for sensitive skin. At least 40% - 50% of individuals in modern society have complaints such as itching due to a sensitive scalp. The sensitivity of the scalp is similar between races. This is not a skin disease, but we have to think about how problems that customers face can be solved. Skin barrier and sensitive scalp are closely related. Collectively, strengthening or lowering the effect on the scalp barrier may result in a healthy scalp environment. As a result, it will alleviate people’s complaints about the scalp.展开更多
文摘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.
文摘With the exception of conditions such as dandruff, interest in the scalp is relatively low. However, when we consider the scalp as part of the skin, interesting observations can be made. The average amount of sebum secretion in the scalp varies depending on sex. Several studies show differences in scalp characteristics among races, but in some cases, these are difficult to find. The scalp has a weaker barrier function than does facial skin. The reason for the weak barrier function is unclear, but it is necessary to consider the effect of dandruff on the scalp. Growth of dandruff-related bacteria weakens the barrier. However, strengthening the barrier suppresses dandruff. In other words, there is an interdependency between scalp bacteria and skin, which is important for the maintenance of scalp barrier homeostasis. Anxiety regarding a sensitive scalp is as high as that for sensitive skin. At least 40% - 50% of individuals in modern society have complaints such as itching due to a sensitive scalp. The sensitivity of the scalp is similar between races. This is not a skin disease, but we have to think about how problems that customers face can be solved. Skin barrier and sensitive scalp are closely related. Collectively, strengthening or lowering the effect on the scalp barrier may result in a healthy scalp environment. As a result, it will alleviate people’s complaints about the scalp.
