Among the spectrum of effects induced by UV radiation on the skin, erythema is the most popular one. It is a cutaneous inflammatory reaction correlated with acute photodamage, which can be reduced by the correct application of sunscreen.

The present study evaluated the utilization of a sunscreen SPF50 with high antioxidant capacity for 15 days by young men without photoprotection habits.

The study evaluated erythema, skin hydration properties, and dermis echogenicity using skin imaging techniques. It enrolled forty male participants (aged between 18 and 28 years old), 36 without previous photoprotection habits, and evaluated erythema using a visual score and skin colorimeter. It also obtained macroscopic images (VivaCam®). The study evaluated Dermis echogenicity using high-frequency ultrasonography. All the participants received a sunscreen SPF 50 for application for 15 days.

The study observed-

• A strong correlation between the visual score and the colorimeter results.
• Visual and biophysical methodologies showed a reduction in the visual erythema.
• Improvement in dermis echogenicity that possibly correlated with acute inflammation reduction.
• No alterations in the skin hydration and skin barrier parameters.

This study shows that using complementary and correlating different skin biophysical and imaging techniques allow a better comprehension of the skin′s early photoaging process due the direct sun exposure. The utilization of an SPF 50 sunscreen with high antioxidant potential causes a reduction in the erythema after 15 days of usage; however, it did not improve the skin barrier or SC hydration.

Infante VHP, Maia Campos PMBG. Applying sunscreen SPF 50 with high antioxidant capacity during fifteen days improves the dermis echogenicity and reduces the reddish skin undertone. J Cosmet Dermatol. 2022 Nov 27. doi: 10.1111/jocd.15528. Epub ahead of print. PMID: 36437638.