RT Journal Article
T1 Sunscreens effectiveness are not altered by concomitant use of moisturizing creams: An ultraviolet reflectance photography study
A1 Victoria de Galvez, Maria
A1 Aguilera, Jose
A1 Leal, Maria
A1 Sanchez-Roldan, Cristina
A1 Herrera-Ceballos, Enrique
K1 moisturizing formula
K1 sun protection
K1 sunscreens
K1 ultraviolet reflectance photography
K1 Sun protection factor
K1 Uv photography
AB Background Sunscreens are widely used to protect the skin against the harmful effects of solar radiation. It is not known whether solar protection factor of a sunscreen is altered by the concomitant use of other cosmetic products. Objectives The aim of this study was to analyze changes in the protective effect of different commercial and ISO standards sunscreens with high SPF applied shortly before and after application of non-sunscreens galenic formulas type moisturizing creams. Methods ISO 24444:2019 standard sunscreens, which claimed SPF 16 and 63, as well as 4 different claimed SPF 50 and 50+ commercial sunscreens were prepared and applied in different sequential order to the back of 25 volunteers and compared with different commercial moisturizing formulas. Ultraviolet (UV) reflectance photography followed by image analysis was used to compare untreated skin and skin treated with moisturizing creams alone and combined with sunscreens. Results The UV reflectance analysis showed no significant changes of the skin color reflectance treated with moisturizing cream compared with untreated skin. Application of the sunscreen formulations were associated with a 35% - 70% decrease in color related to the in vivo expected SPF, indicating significant UV absorption for all sunscreen formulas. All standard and commercial sunscreens showed no significant differences in UV reflection color level when combined with the different moisturizing creams applied before or after the sunscreen. Conclusions Effectiveness of low- and high-protection sunscreens were not altered by the concomitant use of a moisturizing creams applied shortly before and after the sunscreens.
PB Wiley
SN 0905-4383
YR 2021
FD 2021-11-23
LK https://hdl.handle.net/10668/26891
UL https://hdl.handle.net/10668/26891
LA en
DS RISalud
RD Apr 17, 2025