Po
Polysilicone-15
Polysilicone-15SPF filter
A UVB filter on a silicone chain that adds a little protection alongside others — EU-permitted, not a US sunscreen active.
What it does
It absorbs UVB (burning rays), peaking around 310 nm, but not UVA. On its own it adds little protection, so it works as a supporting filter next to others. The EU allows it up to 10%; it isn’t on the US FDA’s list of sunscreen ingredients.
The evidence, graded
moderatePolysilicone-15 absorbs UVB light, peaking near 310 nm. The EU permits it in sunscreens up to 10%, and it is not on the US list of sunscreen actives. On its own it contributes little SPF, so it works as a supporting filter.EU 2009 · Official Journal of the European Union ↗
Graded per the methodology: strong · moderate · emerging · expert consensus. A weak source on a strong claim gets the weaker label.
Also known as
parsol slx, dimethicodiethylbenzalmalonate, benzylidene malonate polysiloxane
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