[ryanchoi]

The four ingredients here (avobenzone, oxybenzone, ecamsule and octocrylene) seem to be specific to chemical* sunscreens, as opposed the sunscreens that are "physical" like Titanium dioxide/zinc oxide based ones.

They're like the ones in the Hawaii ban on some otc sunscreens (on oxybenzone and octinoxate) because those two chemicals appear to be particularly bad for coral reefs or something.

Then again, there is ofc the issue of nanoscale particles on your face passing through your own skin, but that sounds like it applies for a lot of modern makeup anyways. And for that, I take it cosmetics R&D people already have something on this...(?)

(*Chemical/physical sunscreens are categorized by their uv protection mechanisms: the former type generally uses organic compounds to absorb uv, the latter type uses inorganic compounds to generally just reflect/scatter, to loosely put it)