Characteristic features of ageing in Korean women’s hair and scalp

Kim, S.N.; Lee, S.Y.; Choi, Man Ho; Joo, Kyung Mi; Kim, S.H.; Koh, Jai‐Kyoung; Park, W.S.

doi:10.1111/bjd.12185

Cited by 29 publications

(30 citation statements)

References 24 publications

(43 reference statements)

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“…There was 18% decrease between women in their 20s Our previous study showed that hair density decreased about 25% in Korean women in their 60s versus their 20s. In addition, the average hair diameter was the highest in their 20s in Korean and significantly decreased from the 50s to the 60s [6]. It implies that there are differences on hair-loss parameters with ageing between Asians.…”

Section: Hair Density and Diametermentioning

confidence: 92%

“…It was correlated with the result of visual evaluation which showed increased gray hair and color fadedness with ageing (Table 2). Hair lightness and gray-hair ratio increased significantly from 50s in Korean [6]. However, as shown in Table 2, these factors tend to increase gradually with ageing in Chinese women.…”

Section: Hair Colormentioning

confidence: 94%

“…In Korean women, for example, the average hair diameter was highest in their 20s, maintained steadily until 50, and then decreased significantly [6].…”

Section: Introductionmentioning

confidence: 96%

See 2 more Smart Citations

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

Kim¹,

Kim²,

An³

et al. 2017

JCDSA

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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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Section: Hair Density and Diametermentioning

confidence: 92%

Section: Hair Colormentioning

confidence: 94%

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

Kim¹,

Kim²,

An³

et al. 2017

JCDSA

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“….with ethnics, age or fashion [1]. The cycles appear progressively altered with age in most subjects [6], where the anagen phase shortens, together with a thinning of still growing hairs. The latter may not be immediate, some follicles showing some delay in producing a new hair, a phenomenon called the 'hair eclipse' [2,3].…”

Section: Introductionmentioning

confidence: 99%

Changes in Chinese hair growth along a full year

Liu¹,

Yang²,

Qu³

et al. 2014

Intern J of Cosmetic Sci

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“…Breaking force was found to decline with age, however, the hair diameter also declines with age, such that the breaking stress (calculated as breaking force divided by the crosssectional area) remains constant [24], indicating that the effect is indeed GAN-related.…”

Section: Analysis Of the X-ray Diffraction In Giant Axonal Neuropathymentioning

confidence: 95%

Giant axonal neuropathy alters the structure of keratin intermediate filaments in human hair

Soomro

Alsop

Negishi

et al. 2017

J. R. Soc. Interface.

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Giant axonal neuropathy (GAN) follows an autosomal recessive genetic inheritance and impedes the peripheral and central nervous system due to axonal swellings that are packed with neurofilaments. The patients display a number of phenotypes, including hypotonia, muscle weakness, decreased reflexes, ataxia, seizures, intellectual disability, pale skin and often curled hair. We used X-ray diffraction and tensile testing to determine potential changes to the structure of keratin intermediate filaments (IFs) in the hair of patients with GAN. A statistically significant decrease in the 47 and the 27 Å diffraction signals were observed. Tensile tests determined that the hair was slightly stiffer, stronger and more extensible in GAN patients. These results suggest that the structure of keratin IFs in hair is altered in GAN, and the findings are compatible with an increased positional disorder of the keratin tetramers within the hair fibres.

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Characteristic features of ageing in Korean women’s hair and scalp

Abstract: These results show that intrinsic ageing produces diverse changes in the hair and scalp features of Korean women from their 40s, and the ageing features of Korean women's hair could be partially different from that of women in other countries.

Cited by 29 publications

References 24 publications

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

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

Changes in Chinese hair growth along a full year

Giant axonal neuropathy alters the structure of keratin intermediate filaments in human hair

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