++++
[ DemythSkin Verdict ]
La Roche-Posay Effaclar Duo(+)/DUO (+M) SPF 30 (Effaclar Duo+ LSF 30)
SunscreenSun Protection
Efficacy
Strong
4.1 / 5.0
Safety
Caution
3.7 / 5.0
System Verdict
High-performance acne sunscreen with solid actives, but the alcohol-heavy, fragranced base keeps this far from a gentle daily SPF. Efficacy is boosted by S Tier salicylic acid/LHA and a robust UV filter system (UVA + UVB coverage) plus A Tier niacinamide and zinc PCA for acne and post-inflammatory marks, yet these are mostly in the mid-INCI range and paired with a lean hydrating base, so the anti-acne/brightening benefits are moderate rather than clinic-grade; safety is penalized by high Alcohol Denat. near the top, a harsh sulfonate surfactant, and added fragrance, which meaningfully raises irritation risk for compromised or sensitive acne-prone skin.
Active Ingredients Detected
S Tier: Gold StandardsHigh Clinical Proof | Skin-Transformative
Salicylic Acid
A Tier: Good BasicsProven Results
Aqua / WaterGlycerinHomosalateEthylhexyl SalicylateNiacinamideButyl MethoxydibenzoylmethaneDimethiconeDimethicone/Vinyl Dimethicone CrosspolymerCapryloyl Salicylic Acid (LHA)Vitreoscilla Ferment
B Tier: Supporting IngredientsPromising Ingredients
OctocryleneSorbitan StearateSilicaIsopropyl Lauroyl SarcosinateStyrene/Acrylates CopolymerPropylene GlycolPotassium Cetyl PhosphateDiisopropyl SebacatePEG-20PEG-8 LaurateZinc PCASodium Dodecylbenzenesulfonate2-Oleamido-1,3-Octadecanediol (Procerad)Inulin Lauryl CarbamateMannoseCarnosinePoloxamer 338Ammonium Polyacryloyldimethyl TaurateDisodium EDTASucrose CocoateXanthan Gum
D Tier: Potential IrritantsBe Cautious
Alcohol Denat.Parfum / Fragrance
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DemythSkin is an independent ingredient analyzer. Scores are computed by a deterministic rubric from published clinical evidence — no brand pays for a score.