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A novel method for evaluating sun visible light protection factor and pigmentation protection factor of sunscreens
INTRODUCTION: The role of visible light (VL) in the process of skin pigmentation by solar radiation has been demonstrated. Sunscreens with the presence of pigments, particularly iron oxide (IO), have a greater protective effect against VL and are, therefore, highly recommended for prevention and tre...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Dove
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6718061/ https://www.ncbi.nlm.nih.gov/pubmed/31695466 http://dx.doi.org/10.2147/CCID.S207256 |
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author | Schalka, Sérgio de Paula Corrêa, Marcelo Sawada, Leticia Yumi Canale, Camila C de Andrade, Thayna N |
author_facet | Schalka, Sérgio de Paula Corrêa, Marcelo Sawada, Leticia Yumi Canale, Camila C de Andrade, Thayna N |
author_sort | Schalka, Sérgio |
collection | PubMed |
description | INTRODUCTION: The role of visible light (VL) in the process of skin pigmentation by solar radiation has been demonstrated. Sunscreens with the presence of pigments, particularly iron oxide (IO), have a greater protective effect against VL and are, therefore, highly recommended for prevention and treatment of hyperpigmentation disorders. This study aimed to evaluate 33 sunscreen formulations, and through spectrophotometric measurements, proposes new methods to evaluate the VL protection factor and the pigmentation protection factor. METHODS: 33 sunscreen formulations marketed in Brazil were evaluated, including 17 products containing pigments and 16 products with no pigments. Spectrophotometric measurements were taken to determine solar VL protection factor and the pigmentation protection factor, based on the absorption curve of the product, the pigmentation action spectrum and sun spectrum. RESULTS: Sunscreen with pigments presented a higher solar VL protection factor and pigmentation protection factor compared to products without pigment. The statistical analysis showed a strong correlation between the solar VL protection factor and the integral of the absorption curve in the VL range and the transmittance reduction (%) in the same range. The correlation between the VL protection factor and the pigmentation protection factor was also demonstrated. CONCLUSION: The VL protection factor and the pigmentation protection factor showed to be adequate metrics to estimate the effectiveness of sunscreens in the prevention of the pigmentary effect of solar VL and the pigmentary effect of the complete spectrum of immediate pigmentation. |
format | Online Article Text |
id | pubmed-6718061 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Dove |
record_format | MEDLINE/PubMed |
spelling | pubmed-67180612019-11-06 A novel method for evaluating sun visible light protection factor and pigmentation protection factor of sunscreens Schalka, Sérgio de Paula Corrêa, Marcelo Sawada, Leticia Yumi Canale, Camila C de Andrade, Thayna N Clin Cosmet Investig Dermatol Original Research INTRODUCTION: The role of visible light (VL) in the process of skin pigmentation by solar radiation has been demonstrated. Sunscreens with the presence of pigments, particularly iron oxide (IO), have a greater protective effect against VL and are, therefore, highly recommended for prevention and treatment of hyperpigmentation disorders. This study aimed to evaluate 33 sunscreen formulations, and through spectrophotometric measurements, proposes new methods to evaluate the VL protection factor and the pigmentation protection factor. METHODS: 33 sunscreen formulations marketed in Brazil were evaluated, including 17 products containing pigments and 16 products with no pigments. Spectrophotometric measurements were taken to determine solar VL protection factor and the pigmentation protection factor, based on the absorption curve of the product, the pigmentation action spectrum and sun spectrum. RESULTS: Sunscreen with pigments presented a higher solar VL protection factor and pigmentation protection factor compared to products without pigment. The statistical analysis showed a strong correlation between the solar VL protection factor and the integral of the absorption curve in the VL range and the transmittance reduction (%) in the same range. The correlation between the VL protection factor and the pigmentation protection factor was also demonstrated. CONCLUSION: The VL protection factor and the pigmentation protection factor showed to be adequate metrics to estimate the effectiveness of sunscreens in the prevention of the pigmentary effect of solar VL and the pigmentary effect of the complete spectrum of immediate pigmentation. Dove 2019-08-28 /pmc/articles/PMC6718061/ /pubmed/31695466 http://dx.doi.org/10.2147/CCID.S207256 Text en © 2019 Schalka et al. http://creativecommons.org/licenses/by-nc/3.0/ This work is published and licensed by Dove Medical Press Limited. The full terms of this license are available at https://www.dovepress.com/terms.php and incorporate the Creative Commons Attribution – Non Commercial (unported, v3.0) License (http://creativecommons.org/licenses/by-nc/3.0/). By accessing the work you hereby accept the Terms. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed. For permission for commercial use of this work, please see paragraphs 4.2 and 5 of our Terms (https://www.dovepress.com/terms.php). |
spellingShingle | Original Research Schalka, Sérgio de Paula Corrêa, Marcelo Sawada, Leticia Yumi Canale, Camila C de Andrade, Thayna N A novel method for evaluating sun visible light protection factor and pigmentation protection factor of sunscreens |
title | A novel method for evaluating sun visible light protection factor and pigmentation protection factor of sunscreens |
title_full | A novel method for evaluating sun visible light protection factor and pigmentation protection factor of sunscreens |
title_fullStr | A novel method for evaluating sun visible light protection factor and pigmentation protection factor of sunscreens |
title_full_unstemmed | A novel method for evaluating sun visible light protection factor and pigmentation protection factor of sunscreens |
title_short | A novel method for evaluating sun visible light protection factor and pigmentation protection factor of sunscreens |
title_sort | novel method for evaluating sun visible light protection factor and pigmentation protection factor of sunscreens |
topic | Original Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6718061/ https://www.ncbi.nlm.nih.gov/pubmed/31695466 http://dx.doi.org/10.2147/CCID.S207256 |
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