The impact of solar radiation on skin has long been understood but what about UV’s effects on our skin’s hidden world – its microbiome?

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An article from American Society for Photobiology’s journal delved into existing knowledge on solar radiation’s impact on the skin microbiome and proposed innovative sun protection methods that safeguard both skin integrity and microbiome balance.

Experts offered insights into novel sun protection products designed to shield the skin and mitigate the effects of solar radiation on the skin microbiome. Solar radiation exposure can alter microbiome composition, potentially leading to dysbiosis (an imbalance in the microbiome), compromised skin barrier function, and immune system activation.

Microbiome health

Current sun protection methods generally overlook microbiome considerations. Tailored sun protection products that prioritize both skin and microbiome health may offer enhanced defense against solar radiation-induced skin conditions.

Key findings include:

  • The incorporation of topical sunscreens with film-forming properties not only offers effective sun protection but also enhances the skin barrier, potentially aiding in the preservation of a healthy microbiome by reducing the penetration of harmful UV radiation and environmental stressors.
  • Novel sun-protecting products containing pre and probiotics and other beneficial ingredients may potentially help to protect the skin microbiota from SR damages and help to limit the exposome-induced immunosuppression of the host.
  • There is evidence that UVR destroys substances such as porphyrins which are absorbed in the long UVA range and especially in the visible range and which are produced by several microorganisms including the skin commensal Cutibacterium acnes and Pseudomona aeruginosa. Thus, UVR may impact the skin microbiome composition leading to dysbiosis and an altered skin barrier.

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