Since skin on the lips has a lower water content in the stratum corneum (SC) and a higher transepidermal water loss (TEWL) value than skin on the cheek, the lips are usually very dry and rough areas. Therefore, a lip balm approach to increase occlusivity of the lips is generally used to reduce water loss. Although there have been reports of an improvement effect on lip roughness by specific care agents, differences in the effects due to the occlusivity of a formulation without a specific care agent have not been reported. The purpose of this study was to clarify the improvement effect on dryness and roughness of the lips by a highly occlusive formulation consisting of a combination of common oil and wax, not by a specific care agent.

中文翻译：

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高度封闭配方对干燥嘴唇的功效。

由于唇部皮肤的角质层 (SC) 含水量较低，经表皮失水量 (TEWL) 值高于脸颊皮肤，因此唇部通常是非常干燥和粗糙的区域。因此，通常使用润唇膏来增加嘴唇的咬合力来减少水分流失。尽管有报道称特定护理剂对唇部粗糙有改善作用，但尚未报道由于不含特定护理剂的配方的封闭性而导致的效果差异。本研究的目的是阐明由普通油和蜡的组合组成的高度封闭配方，而不是特定的护理剂，对嘴唇干燥和粗糙的改善效果。