Skin Conditions on the Dorsal Hands of Japanese and Caucasian Women

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  • 日本人と欧米白人女性の手の甲の肌特性解析
  • ニホンジン ト オウベイ ハクジン ジョセイ ノ テノコウ ノ ハダ トクセイ カイセキ

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It is generally possible to estimate a person's age looking at the back of their hands. Most women are concerned about hand roughness and dryness. It has been reported that application of hand creams to the hand resulted in increased water content and decreased water loss. However, other aspects regarding the skin condition of the dorsal hands have not been well studied. Here we first examined the areas of the skin experienced as getting weaker in women from three countries (Japan, Hong Kong and the United States); the level of concern about the skin on the back of the hands was found to be high. Next, 73 female Japanese and Caucasian volunteers aged 30's-50's living in Japan were recruited. Skin parameters such as water content, transepidermal water loss, elasticity, and skin color (red, yellow) were assessed on the back of each hand. The skin elasticity was found to be higher in Japanese women than in Caucasian women, and the values of elasticity decreased with increased age in both Japanese and Caucasian women. Other parameters including water content did not correlate with aging. As elasticity decreased, the b* value decreased in Japanese women, whereas the hemoglobin index increased in both Japanese and Caucasian women. Next, dorsal hands subjectively classified as “beautiful” and “homely” were selected among volunteers in order to characterize the differences between these two groups. When the skin parameters were compared, beautiful dorsal hands were found to have higher elasticity and brightness, and little redness. We believe that these results may provide insight into how to keep our dorsal hands beautiful.

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