How much UV does a REAL mineral sunscreen absorb and scatter?

sunscreen center mount

Warning: Very nerdy content ahead! If you’ve been following sunscreen discourse (apparently this is a thing now) you’ll know that mineral sunscreens mostly work by absorbing UV and only scattering a small amount, in the region of 4-5% across the range of UV. This was quantified in a pretty commonly cited 2016 paper by Curtis Cole, Thomas Shyr and Hao Ou-Yang, “Metal …

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Will Benzene in Sunscreens Give You Cancer? (with video)

In case you haven’t already heard, the 2021 edition of “This Anti-Cancer Product Is Giving You Cancer” is that there’s been benzene found in a bunch of sunscreens. How much should we be freaking out about this? I did an Instagram post on this already, but I thought I’d elaborate a bit more. The video is here on YouTube, scroll …

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Zinc Sunscreens Don’t Work Better: Every Myth Busted (with video)

Chemical vs Physical Sunscreens: The Science (with video)

There are so many myths around mineral or physical sunscreens – the ones with zinc oxide and titanium dioxide – and how they’re supposedly better than chemical sunscreens with scarier names like oxybenzone and octocrylene. And it’s usually zinc oxide that gets all the hype. Some of these advantages are true… but so many are just myths. And a lot …

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Octocrylene Causes Cancer? and I’m Propaganda Now (with video)

There’s been a recent study published about the sunscreen ingredient octocrylene turning into benzophenone over time. According to the paper, “benzophenone is a mutagen, carcinogen, and endocrine disruptor”. I wasn’t going to do a proper analysis of this paper because it only really got lots of attention in France and not many other places, but then I saw that I …

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Do They Work? Evy 6-Hour Sunscreen, Dermablend Drops in SPF

Evy & Dermablend: Do They Work?

Being the “sunscreen nerd” person, I get a lot of questions about unusual sunscreen products and whether or not their claims work out. Last time I talked about the Colorescience powder sunscreen and the Skinnies “pea-sized amount” claim. Related post: Do They Work? Colorescience SPF Powder, Skinnies “Pea-Sized Amount” (with video) This time I’m talking about two more products that people …

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Sneaky Marketing? The Inkey List Succinic Acid Acne Treatment

The Inkey List Succinic Acid Acne Treatment

The Inkey List are a brand that I generally quite like (well not anymore, now that I’ve seen their response to me raising this issue, and some of their other practices). They’re probably the main competitor to The Ordinary, which I also quite like. Both brands have lots of products, and many of them work well on my skin. They’re …

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