La Roche-Posay Pure 12% Vitamin C Serum Wrinkle Reduction Radiance — Efficacy 4.5/5.0, Safety 3.6/5.0 | DemythSkin
++++
[ DemythSkin Verdict ]
La Roche-Posay Pure 12% Vitamin C Serum Wrinkle Reduction Radiance
La Roche-Posay

La Roche-Posay Pure 12% Vitamin C Serum Wrinkle Reduction Radiance

SerumBrightening
Efficacy
Exceptional
4.5 / 5.0
Safety
Caution
3.6 / 5.0
System Verdict
Potent but unforgiving: this is a high-impact vitamin C + salicylic acid serum in a strongly alcoholic, fragranced base that trades comfort and gentleness for fast results. The efficacy score is driven by a likely ~12% L-ascorbic acid in the second INCI position, supported by vitamin E, humectants, and a true leave-on salicylic acid exfoliant, but penalized by potential instability from water-based ascorbic acid, the presence of denatured alcohol high in the list, and a silicone-heavy, fragranced base that limits tolerability, especially for sensitive or dry skin.
Active Ingredients Detected
S Tier: Gold StandardsHigh Clinical Proof | Skin-Transformative
Ascorbic AcidSalicylic Acid
A Tier: Good BasicsProven Results
GlycerinSodium HyaluronateAdenosineHydrolyzed Hyaluronic AcidTocopherol
B Tier: Supporting IngredientsPromising Ingredients
Polysilicone-11Pentaerythrityl TetraethylhexanoatePeg-20 Methyl Glucose SesquistearatePoloxamer 338Ammonium Polyacryloyldimethyl TaurateTrisodium Ethylenediamine DisuccinateAcetyl Dipeptide-1 Cetyl EsterPolyacrylamideC13-14 IsoalkanePentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate
D Tier: Potential IrritantsBe Cautious
Alcohol Denat.Parfum, Fragrance
What Each Ingredient Does
Aqua, Water, Eau
Primary solvent base
Ascorbic Acid
Vitamin C antioxidant active
Dimethicone
Silicone emollient and slip agent
Glycerin
Humectant for hydration
Alcohol Denat.
Solvent and penetration enhancer
Potassium Hydroxide
pH adjuster (alkali)
Polysilicone-11
Film-forming texture enhancer
Silica
Absorbent and texture modifier
Pentaerythrityl Tetraethylhexanoate
Emollient ester
Peg-20 Methyl Glucose Sesquistearate
Emulsifier and surfactant
Sodium Hyaluronate
Humectant hyaluronic acid salt
Adenosine
Skin-conditioning signaling molecule
Poloxamer 338
Nonionic surfactant and emulsifier
Ammonium Polyacryloyldimethyl Taurate
Polymer thickener and stabilizer
Hydrolyzed Hyaluronic Acid
Low-weight humectant
Caprylic/Capric Triglyceride
Emollient and texture enhancer
Caprylyl Glycol
Humectant and preservative booster
Citric Acid
pH adjuster and chelating agent
Laureth-7
Nonionic surfactant and emulsifier
Trisodium Ethylenediamine Disuccinate
Chelating agent for stability
Bis-Peg/Ppg-16/16 Peg/Ppg-16/16 Dimethicone
Emulsifying silicone and dispersant
Acetyl Dipeptide-1 Cetyl Ester
Peptide-based soothing active
Xanthan Gum
Natural thickener and stabilizer
Pentylene Glycol
Humectant and solvent
Full Ingredient List (INCI)

Aqua, Water, Eau, Ascorbic Acid, Dimethicone, Glycerin, Alcohol Denat., Potassium Hydroxide, Polysilicone-11, Silica, Pentaerythrityl Tetraethylhexanoate, Peg-20 Methyl Glucose Sesquistearate, Sodium Hyaluronate, Adenosine, Poloxamer 338, Ammonium Polyacryloyldimethyl Taurate, Hydrolyzed Hyaluronic Acid, Caprylic/Capric Triglyceride, Caprylyl Glycol, Citric Acid, Laureth-7, Trisodium Ethylenediamine Disuccinate, Bis-Peg/Ppg-16/16 Peg/Ppg-16/16 Dimethicone, Acetyl Dipeptide-1 Cetyl Ester, Xanthan Gum, Pentylene Glycol, Polyacrylamide, C13-14 Isoalkane, Tocopherol, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate, Salicylic Acid, Parfum, Fragrance.

Frequently Asked

Is La Roche-Posay Pure 12% Vitamin C Serum Wrinkle Reduction Radiance worth it?

La Roche-Posay Pure 12% Vitamin C Serum Wrinkle Reduction Radiance scores 4.5 out of 5.0 for efficacy (Exceptional) and 3.6 out of 5.0 for safety (Caution) on DemythSkin's independent ingredient analysis. Potent but unforgiving: this is a high-impact vitamin C + salicylic acid serum in a strongly alcoholic, fragranced base that trades comfort and gentleness for fast results. The efficacy score is driven by a likely ~12% L

What are the key active ingredients in La Roche-Posay Pure 12% Vitamin C Serum Wrinkle Reduction Radiance?

La Roche-Posay Pure 12% Vitamin C Serum Wrinkle Reduction Radiance contains these gold-standard actives with strong clinical evidence: Ascorbic Acid, Salicylic Acid.

Does La Roche-Posay Pure 12% Vitamin C Serum Wrinkle Reduction Radiance contain fragrance or known irritants?

DemythSkin flags these ingredients in La Roche-Posay Pure 12% Vitamin C Serum Wrinkle Reduction Radiance as potential irritants: Alcohol Denat., Parfum, Fragrance. This product does contain fragrance.

How is La Roche-Posay Pure 12% Vitamin C Serum Wrinkle Reduction Radiance scored?

DemythSkin grades every product on two independent axes: efficacy (whether the ingredients have clinical evidence of working) and safety (irritation and sensitisation risk). Ingredients are classified S through D against a database of over 3,000 compounds. No brand pays for a score.

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Analysis last updated: 2026-09-09. DemythSkin is an independent ingredient analyzer. Scores are computed by a deterministic rubric from published clinical evidence — no brand pays for a score. DemythSkin earns commission from affiliate links (Amazon Associates and others). Scores are computed before any commercial relationship — the link follows the verdict, never the other way around.