Products › Serum › Sunday Riley C.E.O. 15% Vitamin C Brightening Serum
C.E.O. 15% Vitamin C Brightening Serum
C.E.O. 15% Vitamin C Brightening Serum is middling — some recognized actives, but dosing or disclosure holds it back.
Actives pyramid
What's actually in it, ranked by how well it's dosed.
What it does
Evidenced benefit intensity, derived from dosed actives.
The receipt
Every point of this grade, traced to the active, its dose, and the evidence.
Tetrahexyldecyl Ascorbate at 15% — strong dose
Above the ~3% where an oil-soluble, stable vitamin C derivative that penetrates well at low concentrations.
Brand clinical study available
The brand has run a clinical/consumer study on this product. Useful, though not independent.
Pros & cons
The honest tradeoffs.
- Tetrahexyldecyl Ascorbate at a strong, research-backed dose (15%)
- Brand has run a clinical/consumer study on this product
Best for
Who and when this fits.
Dupes & alternatives
Cheaper products in the same category that grade equal or higher.
B The Ordinary Niacinamide 10% + Zinc 1%$6
save 93% B The Ordinary Niacinamide 10% + Zinc 1% Oil Control Serum
$6
save 93% B Minimalist Niacinamide 5% + Hyaluronic Acid 1% Face Serum
$11.99
save 86% B The Ordinary Resveratrol 3% + Ferulic Acid 3%
$12
save 86%
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Get Visage VerifiedBased on published concentration thresholds and formulation science. Our algorithm predicts likely efficacy — it does not test the product. Individual results vary. Not evaluated by the FDA. You can't pay to move a grade — Visage Theory is paid only for optional audits and seal licenses, never to change a letter.