The real protection of facial sunscreens

Impacts of sun protection and skin care habits in the biophysical and morphological properties of young men skin

“…Even the participants with photoprotection habits present some limitations regarding the comprehension of sunscreen application. This discussion agrees with other studies, reinforcing that the methodology to the SPF evaluation does not represent the real sunscreen application 17 …”

“…This discussion agrees with other studies, reinforcing that the methodology to the SPF evaluation does not represent the real sunscreen application. 17 It is also possible to discuss how photoprotection is important to protect the skin from damage caused by UV light. This aggression can affect skin elasticity by destroying collagen and impairing the depth of papillae in dermal epidermal junction, for example.…”

Layering sunscreen with facial makeup enhances its sun protection factor under real‐use conditions

“…One previous study found that various types of sunscreen and facial makeup were applied at different concentrations by consumers, with differing effects on SPF. 28 We figured out that the proportional reduction in SPF was higher than that for the low-SPF products when less product was applied. It has been known that when the concentration of sunscreen is halved, reduction of the SPF ranged from 1.5 to 3.8 times lower.…”

“…However, numerous published reports have revealed that the majority of sunscreen users apply less than the optimal dose of sunscreen, ranging from 20% to 50% of the recommended 2 mg/cm 2 dose. [8][9][10]12,28 One previous study on the quantities of various cosmetic products actually applied by Japanese individuals suggested that each person applied 0.82 g sunscreen and 0.138 g liquid foundation per application on average. 16 In our study, the real-use conditions of layering were set as reduced application dose as well, and we simulated the use of even lower concentrations of makeup products than sunscreen, guided by our small-scale pretest and previous studies.…”

“…16 In our study, the real-use conditions of layering were set as reduced application dose as well, and we simulated the use of even lower concentrations of makeup products than sunscreen, guided by our small-scale pretest and previous studies. 16,28 The use of less makeup than sunscreen may be due to the easily observed change in facial color upon application of makeup products. One previous study found that various types of sunscreen and facial makeup were applied at different concentrations by consumers, with differing effects on SPF.…”