All things SPF
May 01, 2026
Non-Nano Zinc Oxide: What It Means and Why It Matters
Non-nano zinc oxide means the zinc oxide particles are larger than 100 nanometers, large enough that they don't penetrate the skin barrier...
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April 30, 2026
The Inactive List Is Where the Formula Hides.
How to Read a Sunscreen Label Cosmetic and over-the-counter drug ingredients are listed in descending order by concentration. Active ingredients appear separately...
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April 29, 2026
The Best Mineral Sunscreen for Oily Skin That Won't Make You Shiny
Why Most Sunscreens Make Oily Skin Worse If you have oily skin, you have probably already accepted that sunscreen is a problem....
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April 27, 2026
Your Phone Emits About 1,000x Less Blue Light Than the Sun.
Blue light from screens can cause skin effects, but at far lower intensities than solar blue light, your phone emits roughly 1,000...
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April 26, 2026
5 Ingredients vs. 30: Why Less Is More in Sunscreen
Most sunscreens have 20–30 ingredients not because they need to, but because they are correcting for formulation problems created by the actives...
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April 24, 2026
Broad Spectrum Is a Test, Not a Claim. Ours Scored 381.67nm.
Broad spectrum is an FDA-regulated claim that requires a sunscreen to achieve a critical wavelength of 370nm or greater, meaning its protection...
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April 22, 2026
We Tested the Viral DIY Sunscreen Recipe at an FDA-Approved Lab. It Came Back SPF 13.
You've seen the videos. Beeswax, some type of oil, zinc oxide, an immersion blender. Promises of SPF 30, 40, even 50, all...
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September 17, 2025
The Best Sunscreen for Beards: Why White Cast Happens and How to Fix It
Mineral sunscreen that doesn't turn your beard white.
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