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OSU Zinc Study (mixed spf filters)
Anyone else out there in the sunscreen world getting this article/study sent to them, every hour on the hour, by concerned customers and/or their customer service team? Following on the heels of the whole benzene thing earlier this year, I’m hearing a lot of “maybe we just shouldn’t be wearing sunscreen” which I don’t think is the answer here.
Wondering what other people’s thoughts on this are. Full disclosure, I do a lot of work with full zinc sunscreens, so it feels a little skewed to me but I’m trying to keep that feeling separate and actually just review the study itself.https://link.springer.com/article/10.1007/s43630-021-00101-2
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6 Replies
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@JMc That’s one of the risks of using uncoated inorganic filters. Both TiO2 and ZnO are catalysts (TiO2 being more active than ZnO). So, the best way to avoid (or at least delay) photocatalitic reactions in your sunscreen is to use coated inorganic filters (stabilized with alumina and coated with some fatty ingredient to increase dispersibility), antioxidants and excited state quenchers.
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Wonder at use of DMSO. Maybe pharma can comment - didn’t see that factor controlled.
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Yeah this seems like it’s pretty much a scientist ignorant of how sunscreens are actually made (using coated zinc oxide) “discovering” something that industry has known about and solved decades ago.
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Yeah - I had the same feelings. Thanks all! Hopefully it will blow over (but I feel like it’s definitely another week I’m glad I hang out in the lab and don’t handle the CustServ calls, lol). Cheers
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Hi @Perry & everyone else.
I also came across these links.
I am a bit confused and seeking clarification please:
Does this study apply only to sunscreens where a combination of ZnO + other organic UV filters are present or even if ZnO is used alone.
@Perry Are you able to please share links for the safety of coated and uncoated ZnO
TIA
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