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By: Rachel Grabenhofer, Cosmetics & Toiletries
Posted: August 2, 2013, from the August 2013 issue of Cosmetics & Toiletries.
Blue fluorescent compounds to restore luminosity in sun-exposed skin
C Reicks, J Groathouse, M Trauernicht, S Sikich, MV Wilson, AE Holmes and AJ Jackson; Aug. 7, 2012 (online), Feb. 2013 (print), Skin Research and Technology
Work published in Skin Research and Technology describes blue fluorescent solids, referred to as wild plum compounds, that camouflage skin imperfections when incorporated into cosmetics. The authors first evaluated the connection between sun exposure and skin fluorescence, then determined whether the application of wild plum-containing products restored lost fluorescence to skin.
The forehead skin of two groups of volunteers, of mixed gender and age, was evaluated for fluorescence and redness. In addition, subjects answered questions describing any adverse sensations after being exposed to wild plum formulations. Fluorescence measurements of both sun-exposed and non-sun-exposed skin indicated that repeated exposure causes a loss of skin fluorescence; however, application of wild plum-comtaining formulations restored the fluorescence of sun-exposed skin to values beyond that of non-exposed skin. Further, photo analysis and questionnaires indicated that the formulations did not cause irritancy. And although the micrometer size is large enough to prevent skin penetration, it reportedly is still small enough to avoid graininess in the formulation.
Self-assembling nanostructures for improved efficacy
AG Cheetham, P Zhang, Y Lin, LL Lock and H Cui; Feb 4, 2013 (online); J Am Chem Soc