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  • Title: Instrumental and clinical studies of the facial skin tone and pigmentation of Shanghaiese women. Changes induced by age and a cosmetic whitening product.
    Author: Huixia Q, Xiaohui L, Chengda Y, Yanlu Z, Senee J, Laurent A, Bazin R, Flament F, Adam A, Piot B.
    Journal: Int J Cosmet Sci; 2012 Feb; 34(1):49-54. PubMed ID: 21848763.
    Abstract:
    The pigmentation patterns of facial skin of 354 healthy Chinese women aged 18-80 years were investigated clinically and instrumentally. Chromasphere(®) was used to acquire pictures from the cheeks of subjects. Facial skin tone was described by L* parameter from the L,a,b system as well as Individual Typology Angle (ITA). Results show that skin tone becomes significantly darker along the life span. Both size of hyper-pigmented spots and their contrast with surrounding skin were found increased with age. As additional study, 40 women from these 354 subjects were asked to apply daily a whitening cosmetic product for a 2-month period. Such application led to a significantly lighter skin tone, although this study was not vehicle controlled and we cannot exclude that the increase in L* observed was in some part because of cumulative effects of previously used whitening products, there was an association with lighter skin tone as assessed through both instrumental measurements and self-perception by most subjects.
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