Reducing Adverse Effects from UV Sunscreens by Zeolite Encapsulation: Comparison of Oxybenzone in Solution and in Zeolites

  title={Reducing Adverse Effects from UV Sunscreens by Zeolite Encapsulation: Comparison of Oxybenzone in Solution and in Zeolites},
  author={Michelle N. Chr{\'e}tien and Eve Heafey and Juan C. Scaiano},
  journal={Photochemistry and Photobiology},
Oxybenzone (OXB) is one of the most widely employed sunscreen ingredients, yet its allowed load is limited to a maximum of 6% reflecting the frequency with which adverse effects are reported. From a spectroscopic point of view, OXB has excellent absorption properties in both the UVB and UVA regions. We propose that zeolite encapsulation can lead to a sunscreen composite ingredient, that we describe as a supramolecular sunscreen, that will retain the excellent spectroscopic properties of OXB… 
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This work demonstrates that the sunscreen-photoinduced inactivation of a model protein, horseradish peroxidase, is reduced by approximately a factor of three when the sunscreen is encaspsulated in zeolite sodium Y, providing evidence that using the technology ofZeolite encapsulation to prepare a supramolecular sunscreen that minimizes the skin contact of active ingredients may reduce the adverse effects of “naked” sunscreens on biological systems.
An in vitro systematic spectroscopic examination of the photostabilities of a random set of commercial sunscreen lotions and their chemical UVB/UVA active agents.
The photostabilities of a random set of commercially available sunscreen lotions and their active ingredients are examined spectroscopically subsequent to simulated sunlight UV exposure. Loss of
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TiO2-promoted mineralization of organic sunscreens in water suspension and sodium dodecyl sulfate micelles.
  • A. Ricci, M. Chrétien, L. Maretti, J. Scaiano
  • Chemistry
    Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology
  • 2003
The results indicate that in water suspension, mineralization is likely to occur on or near the TiO2 particle surface; when the organic sunscreens are segregated in the micelle core, reactive radicals, produced duringTiO2-promoted degradation of the micellar system, may participate in sunscreen degradation.
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  • F. Gasparro
  • Biology
    Environmental health perspectives
  • 2000
In this review, the basic aspects of sunscreens and skin photobiology are reviewed briefly and in vivo and in vitro methods proposed for the evaluation of candidate sunscreen formulations of UVA protective ability are reviewed.
Effect of nanoparticle encapsulation on the photostability of the sunscreen agent, 2-ethylhexyl-p-methoxycinnamate.
Oxybenzone oxidation following solar irradiation of skin: photoprotection versus antioxidant inactivation.
Although oxybenzone is an excellent broad spectrum UVA filter, its rapid oxidation followed by the inactivation of important antioxidant systems indicates that this substance may be rather harmful to the homeostasis of the epidermis.
Change of ultraviolet absorbance of sunscreens by exposure to solar-simulated radiation.
The analysis showed that the behavior of suncare products was not predictable from its individual ingredients, and photoinactivation of sunscreens appears to be an underestimated hazard to the skin, first, by formation of free radicals, second, by increased ultraviolet A transmission.
Grey Goo on the Skin? Nanotechnology, Cosmetic and Sunscreen Safety
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