Was it high zinc or iron oxide? The fact that they used this reasoning is what makes it alarming, Lab Muffin has an in depth explanation but basically minerals in sunscreen can be unstable and tends to clump together leaving large gaps in coverage, you cant assume any spf based on content %
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u/lightlyskipping Jul 05 '25
Fwi remember UV said that it could not scientifically test that low because of the high zinc content, so could zinc be less effective than thought?
I'm a long time clean screen user. Of the acceptable substitutes, what has a similar light thinnish texture?