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Assessment methods for evaluating the whitening effect of cosmetics on human skin  

Kim, Youn-Soo (Department of Dermatology Chungbuk National University College of medicine Chongju)
Publication Information
Journal of the Society of Cosmetic Scientists of Korea / v.28, no.3, 2002 , pp. 63-90 More about this Journal
Abstract
Quantitative measurement of melanin is the best method to evaluate whitening effect of cosmetics on human skin. However, non-invasive method to quantify human skin melanin with high precision has not been established. Whitening effect of cosmetics on the skin results in lightening of skin color. Therefore, it is reasonable to measure skin color in a reproducible manner for the assessment of whitening effect. Several Instruments or methods, such as colorimeter, mexameter, and visual assessments by experts , have been used for this purpose. In this lecture I will review the details of various assessment methods for the evaluation of whitening effect and discuss the pros and cons of each method. Then I will present briefly the results of clinical trial. Finally I will introduce new non-invasive modalities to quantify melanocytes.
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