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Section: Testing > Sun Protection

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The Best Sunscreen? The One People Will Use.

This guest advisor commentary comes from regular Cosmetics & Toiletries contributor and photochemistry expert Craig Bonda, president of Inception Partners, LLC, and technical consultant to the sunscreen industry.

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Melanoma Risk Drops 40% with Childhood Sunscreen Use

Recent research in JAMA Dermatology suggests that those who regularly used sunscreen as a child are at a significantly lower risk of melanoma; the study also sheds light on who is more likely to take that risk.

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Wet Skin Factor for Sunscreens: An In vitro Method, Part II

Sunscreens designed for application to wet skin are popular in part due to convenience, skipping the drying step completely. In relation, these authors propose a new in vitro test to compare the wet skin factor of sun care products. Here, 20 products were tested and compared according to several conditions in order to define the best parameters for the method.

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Wet Skin Factor for Sunscreens: An In vitro Method, Part I

Sunscreens designed for application to wet skin are popular in part due to convenience, skipping the drying step completely. In relation, these authors propose a new in vitro test to compare the wet skin factor of sun care products. Here, 20 products were tested and compared according to several conditions in order to define the best parameters for the method.

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Sunscreen Data Requests, Misperceptions and the Public Health Crisis

"The FDA is not saying 40% of sunscreens (or whatever) do not meet its rules for safety and effectiveness—not to the extent the EWG is suggesting." But the FDA also is muddying the waters, according to PASS Coalition adviser Michael Werner.

'[Sunscreen] developers will be able to innovate more efficiently while maintaining high standards of quality and safety for consumers.'

[update] How ISO's Endorsement of Two Test Methods Will Enlighten Sunscreen Development

After 10 years, sunscreen developers are nearing the finish line for more ethical, cost efficient, reliable and faster testing thanks to ISO's endorsement of two standards. The final vote was in September 2024. Here, two experts explain what this means.

New U.S. UV Filters and the Cosmetic Outlook in Canada for Sunscreens

Skin cancer is the most common cancer today, but only recently has industry pressure and political leadership compelled changes in the North American regulatory paradigm of sunscreen products. The passage of the Sunscreen Innovation Act in the United States and the suggestion to regulate sunscreens as cosmetics in Canada would give regulators the tools to reboot a stalled approval system.

Article Download: A Laboratory Method for Measuring the Water Resistance of Sunscreens

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Sandblasting to Improve the Reproducibility of In vitro Sunscreen Evaluation

SPF test results from substrates treated using a traditional sandblasting technique are compared with those from substrates treated using a new process. Based on the topographic control of 10 batches and 34 sunscreen evaluations, the authors concluded the new process had better topographic reproducibility, consequently improving the SPF repeatability and reproducibility in vitro.

The skin care industry has typically focused its testing on skin types 1 through 3, leaving 4% of tests with skin types 5 and 6.

Report: Superdrug Commits to Increase Sunscreen Testing on Darker Skin Tones

Superdrug has reportedly committed to include at least 35% of skin types 5 and 6 in its sun cream and skin care trials.

Photostability Test for Additional Sunscreen Claims, Part II: Calculations and Results

Proposed here is an in vitro method, based on UV transmission measurements at two irradiation doses, to test and rank sunscreens based on their photostabilities. This approach was used to assess some 107 sunscreens and shows how, by strictly controlling key parameters, comparisons between the photostabilities of products can be made, with potential for new label claims.

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Are Your Sunscreens Infra-ready? New In vitro Method Puts Data Behind the Claims

Considering more and more sun care products are claiming infrared (IR) protection, it is important to standardize the parameters by which they are evaluated. Since IR-A and IR-B are the most implicated in skin damage, a test method was developed based on these wavelengths, as described here.

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Safer Solar Protection Part II, Going Beyond UV Defense

Recent research has focused on nature’s ways of protecting living organisms, from plankton and cyanobacteria to humans, from the sun. With the proper topical delivery systems, some of these biomechanisms may prove beneficial to consumers and marketers.

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