scholarly journals In vitro water resistance evaluation of a bioactive sunscreen containing distinct film/ barrier-forming agents

2020 ◽  
Vol 17 (2) ◽  
pp. 1-14
Author(s):  
Chin Yi Sul ◽  
Ana Lucia Morocho-Jacomel ◽  
Fabiana Vieira Lima ◽  
Gabriela Argollo Marques ◽  
Wendi Lucia Avila Rodriguez ◽  
...  
Keyword(s):  
Diffuse Reflectance ◽  
Water Resistance ◽  
Protection Factor ◽  
In Vitro Method ◽  
Before And After ◽  
Bioactive Ingredients ◽  
Resistance Assessment ◽  
Sun Protection Factor ◽  
Resistance Tests

The use of functional bioactive ingredients and the property of water resistance are differentials in the choice of more effective and safer sunscreens. Water-resistance tests are expensive, time-consuming, and usually performed on subjects that expose them to irradiation and long immersion times. Thus, the study of in vitro water resistance using different film/ barrier-forming agents is relevant for obtaining sunscreen resistant to rinsing. We aimed to evaluate the water resistance of a rutin-based bioactive sunscreen containing distinct film/barrier-forming agents by an in vitro method. The in vitro water resistance assessment (% WRR) was carried out in a water bath. In vitro sun protection factor (SPF), critical A, (nm), UVA/UVB ratio, and UVA protection factor (UVA-PF(0)) were evaluated before and after rinsing using a diffuse reflectance spectrophotometer with integration sphere. The formulation with dimethicone showed higher values of SPF after rinsing and achieved the requirement of % WRR greater than 50%. All formulations showed similar variations for all other parameters. The results highlighted the property of water resistance provided by the dimethicone, indicating that this emollient is an interesting ingredient choice for sunscreens.

scholarly journals Alkenones, a Renewably Sourced, Biobased Wax as an SPF Booster for Organic Sunscreens

Cosmetics ◽  
2019 ◽  
Vol 6 (1) ◽  
pp. 11 ◽  
Author(s):  
An Huynh ◽  
Mariam Abou-Dahech ◽  
Christopher Reddy ◽  
Gregory O’Neil ◽  
Mark Chandler ◽  
...  
Keyword(s):  
Water Resistance ◽  
Organic Liquid ◽  
Sun Exposure ◽  
Uv Filters ◽  
Protection Factor ◽  
Short And Long Term ◽  
Long Term Consequences ◽  
Sun Protection Factor

Sun exposure can affect the skin in various ways leading to short- and long-term consequences. Waxes are often used to optimize the rheological behavior of products and provide an even sunscreen film on the skin, which can boost the sun protection factor (SPF) of ultraviolet (UV) filters. In this study, a biobased wax, alkenones, sourced from commercially available and sustainable microalgae was evaluated as an SPF booster in sunscreens. Thirty-five sunscreens were formulated using three waxes and four organic liquid UV filters. Products were tested for pH, viscosity, spreadability, stability, as well as in vitro SPF and water resistance. Alkenones’ in vitro SPF boosting capacity was similar to beeswax and cetyl alcohol with three “reef-safe” UV filters. None of the waxes used provided significant water resistance, however, using film-former water resistance could be built into the products. A key finding is that alkenones increased the in vitro SPF without increasing apparent viscosity. All products had a skin-compatible pH and they all remained stable at 25 °C for 10 weeks. Overall, the alkenones’ performance was comparable to those of the comparator waxes. Our in vitro results indicate that alkenones offer a sustainable, biobased, non-animal derived choice as an SPF booster for organic sunscreens.

Evaluation of Sun Protection Factor of Cosmetic Formulations by a Simple Visual In Vitro Method Mimicking the In Vivo Method

2012 ◽  
Vol 101 (2) ◽  
pp. 726-732 ◽  
Author(s):  
Leonardo R. de Paula ◽  
André L.A. Parussulo ◽  
Koiti Araki ◽  
Henrique E. Toma
Keyword(s):  
Sun Protection ◽  
Protection Factor ◽  
In Vitro Method ◽  
Cosmetic Formulations ◽  
Sun Protection Factor

Combination of UVA-filters and UVB-filters or inorganic UV filters—Influence on the sun protection factor (SPF) and the PF-UVA determined by in vitro method

2008 ◽  
Vol 50 (2) ◽  
pp. 159-161 ◽  
Author(s):  
Céline Couteau ◽  
Roula Chammas ◽  
Soumia Alami-El Boury ◽  
Benjamin Choquenet ◽  
Eva Paparis ◽  
...  
Keyword(s):  
Sun Protection ◽  
The Sun ◽  
Uv Filters ◽  
Protection Factor ◽  
In Vitro Method ◽  
Sun Protection Factor

In Vitro Evaluation of Sun Protection Factor of Plant Extracts By Ultraviolet Spectroscopy Method

2021 ◽  
Vol 1 (30) ◽  
pp. 58-62
Author(s):  
Geeta Bhandari Garima Negi
Keyword(s):  
Chronic Exposure ◽  
Sun Protection ◽  
Skin Protection ◽  
Murraya Koenigii ◽  
Protection Factor ◽  
Safe Alternative ◽  
Sun Protection Factor ◽  
Acute And Chronic Exposure ◽  
Sunscreen Products

Abstract-Acute and chronic exposure to nonphysiological doses of ultraviolet radiation leads to variety of changes of skin ranging from sun-burn, erythema to skin cancer. For skin protection from deleterious effects of sunlight, sunscreen products are used in various forms having chemical and physical filters. However, synthetic sunscreen formulations are reported to cause adverse effects. Thus the present study was planned to evaluate the sun protection factor (SPF) of leaves extract of Murraya koenigii for their application as herbal sunscreens. The results suggested that the occurrence of active compounds responsible for ultraviolet absorption can be extracted for use in sunscreens preparations as better, cheaper and safe alternative to harmful chemical sunscreens. Keywords: UV radiations, SPF, Murraya koenigii

Correlation of in vivo and in vitro measurements of sun protection factor

2020 ◽  
Vol 11 (2) ◽  
Author(s):  
M.-T. Sheu ◽  
C.-W. Lin ◽  
M.-C. Huang ◽  
C.-H. Shen ◽  
H.-O. Ho
Keyword(s):  
Sun Protection ◽  
Protection Factor ◽  
In Vitro Measurements ◽  
Sun Protection Factor
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