Uv
Uvinul A Plus
Diethylamino Hydroxybenzoyl Hexyl BenzoateSPF filter
Modern photostable UVA filter. Dedicated long-wavelength UVA coverage; approved in EU/AU/JP, not the US.
What it does
Uvinul A Plus is a dedicated long-wavelength UVA filter (covers UVA1, including 380–400 nm where most sunscreens lose protection). Highly photostable; doesn't degrade in sunlight. Common in modern EU and Japanese broad-spectrum sunscreens. Not US FDA-approved yet, which is part of why US sunscreens often underperform on UVA-1 testing.
The evidence, graded
expert consensusSunscreen must be the final AM step. Applying products on top of sunscreen disrupts the protective film and can compromise the labeled SPF.Petersen 2014 · Photodermatology, Photoimmunology & Photomedicine ↗
expert consensusSPF protection degrades under UV exposure. Reapply sunscreen every 2 hours during continuous sun exposure to maintain rated protection — and immediately after swimming, sweating, or towel-drying.Petersen 2014 · Photodermatology, Photoimmunology & Photomedicine ↗
Graded per the methodology: strong · moderate · emerging · expert consensus. A weak source on a strong claim gets the weaker label.
Also known as
dhhb, diethylamino hydroxybenzoyl hexyl benzoate
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