Compare Products: C.E.O. 15% Vitamin C Brightening Serum vs Vitamin C Suspension 23% + HA Spheres 2%
Ingredient Analysis
Sunday Riley C.E.O. 15% Vitamin C Brightening Serum is a water-based vitamin C moisturizer with gentle exfoliation and skin-identical lipids. The Ordinary Vitamin C Suspension 23% + HA Spheres 2% is an anhydrous oil-serum delivering high-potency pure vitamin C in a waterless base. The better pick depends on your skin type and texture preference.
The Ordinary Vitamin C Suspension 23% + HA Spheres 2% uses pure ascorbic acid, the most studied vitamin C form. Sunday Riley C.E.O. 15% Vitamin C Brightening Serum uses a stable ester that converts to active vitamin C less directly.
Tetrahexyldecyl ascorbate is far more stable than ascorbic acid, which oxidizes quickly once exposed to air or light.
Sunday Riley C.E.O. 15% Vitamin C Brightening Serum contains multiple citrus oils and glycolic acid, raising sensitivity risk. The Ordinary Vitamin C Suspension 23% + HA Spheres 2% has a cleaner, shorter irritant profile.
Sunday Riley C.E.O. 15% Vitamin C Brightening Serum includes saccharide isomerate, glycerin, and jojoba esters for layered hydration. The Ordinary Vitamin C Suspension 23% + HA Spheres 2% relies mainly on sodium hyaluronate.
Sunday Riley C.E.O. 15% Vitamin C Brightening Serum suits normal to dry skin needing moisture. The Ordinary Vitamin C Suspension 23% + HA Spheres 2%'s anhydrous oil base suits dry skin or those layering under a moisturizer.
- •Concentrations for all actives are undisclosed in both lists.
- •Ascorbic acid efficacy in an anhydrous base is debated; it typically requires an aqueous environment to work optimally.
- •Glycolic acid pH in Sunday Riley C.E.O. 15% Vitamin C Brightening Serum is unknown; effectiveness depends on pH being below 4.
- •Citrus essential oils in Sunday Riley C.E.O. 15% Vitamin C Brightening Serum are known photosensitizers; daytime use warrants SPF.
- •BHT in The Ordinary Vitamin C Suspension 23% + HA Spheres 2% is considered safe by most regulatory bodies but is avoided by some consumers.
- •The vitamin C ester in Sunday Riley C.E.O. 15% Vitamin C Brightening Serum must be converted by skin enzymes; conversion efficiency varies by individual.
Analysis generated from both INCI lists using Claude. Ingredient order indicates relative concentration; exact percentages are usually undisclosed.
Who It's Designed For
- Those who want a stable vitamin C that will not oxidize or change color
- Users who find L-ascorbic acid serums too irritating or acidic
- People who enjoy a citrus-scented skincare experience
- Those seeking a vitamin C serum that does not require refrigeration
- Users looking for a luxurious texture that layers well under makeup
- Experienced vitamin C users who want maximum potency at minimum cost
- Those who have built tolerance to lower vitamin C concentrations
- Users willing to work with a challenging texture for strong active delivery
- Budget-conscious shoppers seeking L-ascorbic acid at 23%
- People who use vitamin C as a nighttime treatment
Key Ingredients
15% Tetrahexyldecyl Ascorbate (THD Ascorbate), Squalane, Glycolic Acid, Tocopherol (Vitamin E), Saccharide Isomerate
23% L-Ascorbic Acid, 2% Sodium Hyaluronate (HA Spheres), Squalane
Product Composition
10% similarity (4 ingredients in common)
Only in Sunday Riley (22)▾
Only in The Ordinary (13)▾
User Feedback Patterns
Users consistently praise the lightweight oily texture that absorbs well and sits beautifully under makeup. The application experience is rated higher than most L-ascorbic acid serums.
The orange scent is frequently mentioned as a positive. Users who enjoy scented skincare rate this highly. However, fragrance-sensitive users avoid it.
Users appreciate that the golden color remains consistent throughout the product's life. No anxiety about darkening or wasting product due to oxidation.
Brightening results are described as gradual but visible over 4-8 weeks. Some users expecting the immediate 'glow' of L-ascorbic acid find the results slower.
Nearly all first-time users report significant stinging and tingling. This subsides for most within 1-2 weeks of regular use as skin builds tolerance.
Layering anything over this product commonly causes pilling. Users have found that applying it as the last step at night or mixing with a drop of oil reduces this issue.
Users who tolerate the texture report visible brightening, improved tone, and reduced dark spots. The $8 price point makes it a cult favorite despite the application challenges.
Due to texture and pilling issues, most users reserve this for nighttime use. It does not layer well under sunscreen or makeup.
Which Should You Buy?
The Ordinary Vitamin C Suspension 23% + HA Spheres 2% offers great value at a lower price point. Sunday Riley C.E.O. 15% Vitamin C Brightening Serum may be worth the premium if you want 15% Tetrahexyldecyl Ascorbate (THD Ascorbate).
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