All scans / Moisturizers / La Roche-Posay Effaclar K
La Roche-Posay Effaclar K ingredients: is it worth it?
A competent anti-congestion moisturizer, but not a miracle blackhead eraser.
A competent anti-congestion moisturizer, but not a miracle blackhead eraser.
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The efficacy score is 3.8/5: salicylic acid appears high in the list and receives meaningful leave-on treatment credit, while capryloyl salicylic acid, zinc PCA, silica, silica silylate, and perlite support exfoliation, oil control, and a matte finish. The formula does not disclose the acid concentrations or pH, so the strength and optimal BHA/LHA performance cannot be confirmed; its hydration and barrier support are also modest, relying mainly on glycols, dimethicone, and emollients rather than ceramides or a comprehensive lipid system. The marketed carnosine and vitamin E combination is supportive antioxidant framing, not the main reason to buy it. Fragrance creates an avoidable sensitivity concern.
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DemythSkin rates La Roche-Posay Effaclar K 3.8/5 for efficacy and 4.1/5 for safety.
CONTAINS COMMON SENSITISERS⌄
Fragrance components and essential oils that more often cause reactions in sensitive skin: Parfum / Fragrance. Most people tolerate them; patch test if your skin reacts easily.
ACTIVE INGREDIENTS BY TIER
Gold Standards
High clinical proof | Skin-transformativeReliable
Proven resultsPotent
Developing evidenceOverhyped | Marketing
Hype | Limited dataDocumented Irritants
Evidence-backed flagFORMULATION BASE (14)⌄
FULL INGREDIENT LIST⌄
WATER, PROPYLENE GLYCOL, OCTYLDODECANOL, DIMETHICONE, PEG-100 STEARATE, GLYCERYL STEARATE, SALICYLIC ACID, AMMONIUM POLYACRYLDIMETHYLTAURAMIDE / AMMONIUM POLYACRYLOYLDIMETHYL TAURATE, ZINC PCA, SARCOSINE, SODIUM HYDROXIDE, SILICA, SILICA SILYLATE, PERLITE, CARNOSINE, DISODIUM EDTA, CAPRYLOYL SALICYLIC ACID, XANTHAN GUM, PENTYLENE GLYCOL, ACRYLATES COPOLYMER, CETYL ALCOHOL, BUTYLENE GLYCOL, TOCOPHEROL, PARFUM / FRAGRANCE (B168722/1) Ingredients subject to change at manufacturer&
WHAT EACH INGREDIENT DOES (24)⌄
- Water
- Solvent and formula base
- Propylene Glycol
- Humectant and solvent
- Octyldodecanol
- Emollient and texture agent
- Dimethicone
- Skin protectant and emollient
- PEG-100 Stearate
- Emulsifier and stabilizer
- Glyceryl Stearate
- Emollient and emulsifier
- Salicylic Acid
- BHA exfoliant and pore decongestant
- Ammonium Polyacryldimethyltauramide / Ammonium Polyacryloyldimethyl Taurate
- Polymer thickener and stabilizer
- Zinc PCA
- Sebum-control and conditioning agent
- Sarcosine
- Skin-conditioning amino acid
- Sodium Hydroxide
- pH adjuster
- Silica
- Absorbent and texture modifier
- Silica Silylate
- Oil-absorbing texture modifier
- Perlite
- Mattifying absorbent powder
- Carnosine
- Antioxidant skin conditioner
- Disodium EDTA
- Chelating and formula stabilizer
- Capryloyl Salicylic Acid
- LHA exfoliant and pore conditioner
- Xanthan Gum
- Viscosity control thickener
- Pentylene Glycol
- Humectant and solvent
- Acrylates Copolymer
- Film-forming texture agent
- Cetyl Alcohol
- Fatty alcohol and emollient
- Butylene Glycol
- Humectant and solvent
- Tocopherol
- Vitamin E antioxidant
- Parfum / Fragrance
- Fragrance component
EXTERNAL CITATIONS
Salicylic Acid: Health Canada product database lists salicylic acid at 1.5% for Effaclar K.
Capryloyl Salicylic Acid: La Roche-Posay describes LHA and salicylic acid as the product's pore-unclogging, micro-exfoliating combination.
Zinc PCA: Ingredient is included in the verified INCI as a sebum-control-supporting cosmetic ingredient.
DISCLAIMER: THIS ANALYSIS IS FOR INFORMATION ONLY. NOT MEDICAL ADVICE. AI-GENERATED DATA BASED ON PUBLICLY AVAILABLE INGREDIENT LISTS. VERIFY WITH A MEDICAL PROFESSIONAL.
La Roche-Posay Effaclar K: common questions
Is La Roche-Posay Effaclar K worth it?
La Roche-Posay Effaclar K scores 3.8 out of 5.0 for efficacy (Modest) and 4.1 out of 5.0 for safety (Gentle) on DemythSkin's independent ingredient analysis. A competent anti-congestion moisturizer, but not a miracle blackhead eraser.
What are the key active ingredients in La Roche-Posay Effaclar K?
La Roche-Posay Effaclar K contains these gold-standard actives with strong clinical evidence: Salicylic Acid.
Does La Roche-Posay Effaclar K contain fragrance or known irritants?
DemythSkin flags these ingredients in La Roche-Posay Effaclar K as documented irritants: Parfum / Fragrance. This product does contain fragrance.
How is La Roche-Posay Effaclar K scored?
DemythSkin grades every product on two independent scores: efficacy (whether the ingredients have clinical evidence of working) and safety (irritation and sensitisation risk). Ingredients are graded S through D against a database of over 3,000 compounds. Brand and price are not part of the score, and no brand pays for one.
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