92 SKIN PROTECTION
exposure affects protein carbonylation. At the dose of 2.5% in a basic Carbopol gel, SA is able to reduce such damage and consequently protects the protein function avoiding its deterioration.
Conclusion
It is well noted that UV rays as well as blue light irradiation are responsible for deleterious effects on the skin.
Blue light penetrates deeper in the skin that UV rays. It represents 50% of the energy emitted by the sun and almost 100% of the energy emitted by artificial sources. It is therefore very important to bring protection not only from UV rays but also from blue light. In this study we provide evidence that , from Gelyma, prepared from
Sun’Alg®
Dunaliella salina and Haematococcus pluvialis in a natural oil, exhibits major beneficial effects against indoor and outdoor photodamage. We also confirm the high potential of
microalgae, this large and unexplored group of organisms, as natural and sustainable photoprotectants for cosmetic developments.
Acknowledgments We thank Cynthia Houel (Sephra) and Clement Villar (Gelyma) for their expert technical assistance.
A Explants non irradiated and non treated : red points less abundant. B Explants irradiated and non treated : numerous large red points. C Explants irradiated and treated by placebo : visible large red points. D Explants irradiated and treated by 2.5% SA : red points less abundant.
Figure 4: Immunolabelling of skin human explants submitted to blue light exposure . PC
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