Sun protection efficacy by shade

2017 ◽  
Vol 76 (6) ◽  
pp. AB242
2020 ◽  
Vol 859 ◽  
pp. 159-165
Author(s):  
Tatsanan Kanthik ◽  
Sirilak Lokham ◽  
Srisagul Sungthongjeen

This study aimed to develop sunscreen emulsion from natural sunscreening agents, titanium dioxide and Aloe vera gel extract that have good sun protection efficacy. The effects of formulation variables i.e., particle size and amount of titanium dioxide, amount of Aloe vera gel extract (spray dried powder) and combination of sunscreening agents (titanium dioxide and Aloe vera gel extract) on physical properties and sun protection efficacy (e.g., SPF, UVA/UVB ratio, critical wavelength) of sunscreen products were evaluated. The results showed that the smaller particle size of titanium dioxide improved the sun protection efficacy and increased the UVB absorption edge of the products. SPF of the formulations could be ranked as Nanofine TiO2 (particle size 25–30 nm) > Kingruti T-01 TiO2 (particle size 200 nm) > Pigment TiO2 (particle size < 45,000 nm) and UVA/UVB ratio and critical wavelength of the formulations could be arranged in order as follows: Nanofine TiO2 < Kingruti T-01 TiO2 < Pigment TiO2. Increasing amount of titanium dioxide from 5 to 15 %w/w increased significantly viscosity and SPF of formulations. Aloe vera gel extract itself did not significantly affect SPF, however, combination of Aloe vera gel extract and titanium dioxide seemed to have synergistic effect on sun protection efficacy and decreased viscosity of the formulation. According to the results, the good sunscreen formulation consisted of 15 %w/w Nanofine TiO2, 5 %w/w Aloe vera gel spray dried powder in emulsion base because it was broad spectrum sunscreen and showed high SPF (27.53±1.92), high UVA/UVB ratio with critical wavelength higher than 370 nm.


2015 ◽  
Vol 41 (3) ◽  
pp. 189-199
Author(s):  
Jae Young Yeon ◽  
Seung Deok Hong ◽  
Se Bum Choi ◽  
Ta Gon Kim ◽  
Cheong Hee Lee ◽  
...  

2012 ◽  
Vol 46 (4) ◽  
pp. 16
Author(s):  
LEE A. SAVIO BEERS
Keyword(s):  

1998 ◽  
Author(s):  
G. C. Pieterse ◽  
H. Boer ◽  
E. R. Seydel ◽  
H. de Vries
Keyword(s):  

2020 ◽  
Author(s):  
Karlijn Thoonen ◽  
Liesbeth van Osch ◽  
Rowan Drittij ◽  
Hein de Vries ◽  
Francine Schneider

Sun protection among children is of utmost importance since sunburn in early life is a major risk factor for skin cancer development. Because parents play a vital role in enhancing sun safety among children, this study explored parental perceptions concerning sun exposure, sun protection behaviors, and sunburn in children. Additionally, the context in which children experience sunburn in order to assist the development, optimization, and targeting of sun safety interventions for parents is revealed.A qualitative study design, using a semi-structured interview guide addressing several themes (e.g. sun exposure, sun protection, and sunburn experiences), was used. Data were collected in the Netherlands in the fall of 2019. Parents were recruited via purposive sampling at schools, youth services centers, and social media. In total, 26 interviews were performed. Execution, transcription, and coding of the interviews was done by two researchers, using the qualitative analyzing program Nvivo (interrater reliability of d =.84). Comprehensive findings concerning various themes were retrieved. It was found that sunburn was frequently prevalent among children, even though all parents reported using at least one sun protection measure. Parents were often unaware of their child’s sunburn and its severity. Regarding sun protection measures, parents demonstrated an overreliance on sunscreen, often failing to adequately protect their children’s skin. Water-related activities, a lack of shade, and lack of knowledge regarding UV-index were often related to sunburn. Moreover, unexpected sun exposure or longer exposure duration than initially planned were reported as challenging situations. The majority of parents had positive perceptions regarding tanned skin for both themselves as for children.This study provides directions for future skin cancer prevention efforts targeted at both parents and their children. Since a lack of knowledge regarding sufficient sun protection measures and sunburn occurrence in various situations was reported, educational efforts are warranted. Additionally, focusing on clothing, shade-seeking, and adequate sunscreen use is recommended to increase children’s sun safety. By intervening in the physical environment as well (e.g. providing shady areas), sun protection barriers can be reduced. Lastly, the general positive attitude toward tanned skin evident in this study is certainly worthy of attention in future interventions.


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