For your skin
A dedicated UVA filter that stays put in the sun. UVA is the wavelength behind photoaging and pigmentation, and this ingredient covers the deep end of it reliably without the photo-degradation that plagues older filters. It is a staple of high-PA-rating Korean and European sunscreens, almost always paired with a UVB partner.
Want the science? Keep reading ↓Mechanism of action
A photostable UVA filter with peak absorption ~354 nm, giving the long-UVA coverage that older filters (and even avobenzone, without stabilisation) struggle to hold. Oil-soluble, cosmetically elegant, and stable in sunlight; commonly combined with a UVB filter such as ethylhexyl triazone for balanced broad-spectrum protection. EU/Asia approved; not FDA-approved.
Why we tier this moderate
1 cited paper across 1 country. The mechanism is well-described and there's at least one controlled trial in the literature, but we tier this Moderate rather than Strong to stay honest about how many specific papers we cite directly.
Cited research
Osterwalder U, Sohn M, Herzog B, Global state of sunscreens, Photodermatology, Photoimmunology & Photomedicine 2014;30(2-3):62-80 — comprehensive review of the worldwide UV-filter landscape, including the photostability and spectral coverage of the modern organic filters such as diethylamino hydroxybenzoyl hexyl benzoate (Uvinul A Plus / DHHB)
Sources: PubMed · KCI · J-Stage · CNKI · Wanfang · SFD · MFDS · Cochrane · SCCS · CIR. Every entry points to a specific document. See methodology for what each outcome label means.