New Findings in Sunscreen Preservation

Sharon Laboratories latest scientific research published on MDPI


Sharon Laboratories Innovation Group is pleased to share our latest research paper. “Salicylate UV-Filters in Sunscreen Formulations Compromise the Preservative System Efficacy against Pseudomonas aeruginosa and Burkholderia cepacia”. published on Cosmetics Journal (MDPI)

Sunscreen products are known as challenging to preserve. The unique composition and features which are inherent to sunscreen formulations such as high organic phase vs. water ratio, as well as the presence of specific UV filters such as Octyl Salicylate and omosalate, introduce much complexity to the preservation process.

We took this opportunity to talk with Dr. Paul Salama, Head of Sharon Laboratories Innovation Group. “During our conversations with sun care professionals, we found returning complaints about the difficulties in preserving sunscreens products. We realized we need to further examine this phenomenon to understand how and why it happens. We researched the relationship between different microorganisms and UV filters listed in the pharmacopeia. Once we reached a hypothesis, we did research and validation. We found that Pseudomonas aeruginosa resistance to preservative systems involved its chorismate pathway. This feature led us to further investigate additional microorganisms not required by the pharmacopeia, such as Burkholderia cepacia. Indeed, we found that the problem applies to a wide range of microorganisms and we are happy to share with you our scientific learnings from this important research. We hope it will be enriching and useful for you in better protecting your sunscreen products.”

To read our scientific research click here.

In the next video you can learn more about the challenges in preserving sunscreens and about SharoSUN™ – Sharon Laboratories innovative preservative system for sunscreen products.

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