++++
[ DemythSkin Verdict ]
Olay Regenerist Retinol24 Night Cream
MoisturizerAnti-aging, fine lines, wrinkles, skin firmness, dark spots
Efficacy
Solid
3.8 / 5.0
Safety
Caution
3.5 / 5.0
System Verdict
A decent drugstore retinol moisturizer undermined by weak retinoid derivatives, formaldehyde-releasing preservatives, and unclear active concentrations. While this product contains both Retinol and Niacinamide—two proven anti-aging actives—the efficacy is compromised by several formulation flaws. First, Retinyl Propionate (position 8) is a significantly weaker retinoid ester than Retinol (position 15), suggesting the marketing emphasis on "Retinol24" overstates the formula's potency. Second, DMDM Hydantoin is a formaldehyde-releasing preservative that can irritate sensitive skin and is increasingly phased out by premium brands. Third, the INCI list lacks transparency on active concentrations—Niacinamide is typically effective at 4-5%, but its position (position 13) suggests it may be below optimal levels. The Palmitoyl Pentapeptide-4 (Matrixyl) is a solid peptide with research support, but at position 14 it is likely sub-1% and contributes minimally. The silicone-heavy base (Dimethicone, Dimethicone Crosspolymer) provides good occlusion and feel but may not suit oily or acne-prone skin. For a night moisturizer, the formula adequately hydrates and supports barrier repair via Glycerin and Niacinamide, but the retinoid potency is overstated and the preservative system is dated.
Active Ingredients Detected
S Tier: Gold StandardsHigh Clinical Proof | Skin-Transformative
Retinol
A Tier: Good BasicsProven Results
WaterDimethiconeGlycerinDimethicone CrosspolymerNiacinamide
B Tier: Supporting IngredientsPromising Ingredients
Tapioca StarchPolyacrylamideC13-14 IsoparaffinRetinyl PropionateLaureth-4Polysorbate 20Acrylates/C10-30 Alkyl Acrylate CrosspolymerPalmitoyl Pentapeptide-4Sodium HydroxideDisodium EDTA
D Tier: Potential IrritantsBe Cautious
DMDM HydantoinIodopropynyl ButylcarbamatePhenoxyethanolMethylparabenPropylparaben
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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.