Protection effect of cosmetics on human skin under simulated rigorous environment

Background/purpose: The efficacy of cosmetics on human skin measured under normal mild laboratory environment might be discounted by exterior environment factors such as wind, UV exposure, etc. Few studies have focused on the ‘genuine’ efficacy of cosmetics on human skin during exposure to external...

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Bibliographic Details
Published in:Skin research and technology 2008-02, Vol.14 (1), p.45-52
Main Authors: Cheng, Yan, Dong, Yi-yang, Dong, Mei-xian, Wang, Chao, Su, Ning, Sun, Yuan-tao, Liu, Juan, Zheng, Hong-yan, Schrader, Andreas, Rohr, Mathias, Liu, Wei
Format: Article
Language:English
Subjects:
Adult
Cheek - physiology
Cosmetics - pharmacokinetics
Cosmetics - pharmacology
Electric Capacitance
Emollients - pharmacokinetics
Emollients - pharmacology
Environment, Controlled
Female
Forearm - physiology
Humans
moisturizing
simulated
skin
Skin - drug effects
Skin - radiation effects
Skin Physiological Phenomena
Ultraviolet Rays
Water Loss, Insensible
Wind
windy
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Summary:Background/purpose: The efficacy of cosmetics on human skin measured under normal mild laboratory environment might be discounted by exterior environment factors such as wind, UV exposure, etc. Few studies have focused on the ‘genuine’ efficacy of cosmetics on human skin during exposure to external rigorous environment. The aim of this study was to develop a model for the evaluation of the efficacy of cosmetics on human skin under simulated rigorous environment. Methods: We measured skin water content and transepidermal water loss (TEWL) before and after products application under simulated windy and sub‐erythema UV exposure treatment in a constant temperature and humidity laboratory. Results: The results showed that the products had higher water content and lower TEWL at 2, 4 and 8 h of products application, and ameliorated the skin moisturization situation after a 3‐week continuous use of the products. In addition, the products might protect the skin to maintain the normal water content and TEWL under the simulated windy or sub‐erythema UV exposure treatment in our laboratory when compared with untreated area. Conclusion: Our data indicate that this model may provide a more accurate evaluation for the genuine moisturizing effect of cosmetics under external natural climate.
ISSN:0909-752X
1600-0846
DOI:10.1111/j.1600-0846.2007.00260.x