++++
[ DemythSkin Verdict ]
La Roche-Posay Pure Vitamin C10 Serum
SerumBrightening
Efficacy
Strong
4.3 / 5.0
Safety
Caution
3.6 / 5.0
System Verdict
Potent but spiky: excellent S Tier 10% L‑ascorbic acid in a very alcohol-heavy, fragranced base that trades gentleness for fast absorption and ‘feel’. Efficacy is high because pure ascorbic acid is second on the INCI and buffered with potassium hydroxide to an active pH plus backed by tocopherol, hyaluronic acid and a soothing peptide, but the presence of denatured alcohol in the top 5 and fragrance plus BHA makes this closer to a 4.3/5 workhorse than a gold-standard 4.5–5/5, especially for sensitive or barrier-compromised skin.
Active Ingredients Detected
S Tier: Gold StandardsHigh Clinical Proof | Skin-Transformative
Ascorbic AcidSalicylic Acid
A Tier: Good BasicsProven Results
Aqua / WaterGlycerinDimethiconeSodium HyaluronateAdenosineHydrolyzed Hyaluronic AcidTocopherol
B Tier: Supporting IngredientsPromising Ingredients
CyclohexasiloxanePotassium HydroxidePolymethylsilsesquioxanePolysilicone-11Propylene GlycolPentaerythrityl TetraethylhexanoateC13-14 IsoparaffinPEG-20 Methyl Glucose SesquistearatePoloxamer 338Ammonium Polyacryloyldimethyl TaurateDisodium EDTACaprylyl GlycolLaureth-7Acetyl Dipeptide-1 Cetyl EsterXanthan GumToluene Sulfonic AcidPolyacrylamide
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.