Compare Products: Vitamin Illuminating Serum vs C.E.O. 15% Vitamin C Brightening Serum
Ingredient Analysis
EQQUALBERRY Vitamin Illuminating Serum is a hydration-focused formula with five hyaluronic acid forms, ceramide, and niacinamide. Sunday Riley C.E.O. 15% Vitamin C Brightening Serum centers on oil-soluble vitamin C and light emollients. The better pick depends on whether brightening or barrier repair is the priority.
Sunday Riley C.E.O. 15% Vitamin C Brightening Serum leads with tetrahexyldecyl ascorbate, a stable oil-soluble vitamin C. EQQUALBERRY Vitamin Illuminating Serum relies on arbutin and niacinamide, which are milder brighteners.
EQQUALBERRY Vitamin Illuminating Serum stacks five hyaluronic acid forms, ceramide, and beta-glucan. Sunday Riley C.E.O. 15% Vitamin C Brightening Serum offers only glycerin and saccharide isomerate for hydration.
Sunday Riley C.E.O. 15% Vitamin C Brightening Serum contains four citrus oils, glycolic acid, and two preservatives, raising the risk for sensitive skin. EQQUALBERRY Vitamin Illuminating Serum's irritant load is much lighter.
Sunday Riley C.E.O. 15% Vitamin C Brightening Serum includes glycolic acid, providing chemical exfoliation. EQQUALBERRY Vitamin Illuminating Serum has no exfoliant.
Both products include tocopherol. Sunday Riley C.E.O. 15% Vitamin C Brightening Serum adds vitamin C, while EQQUALBERRY Vitamin Illuminating Serum adds acerola and turmeric extracts, making antioxidant coverage comparable overall.
- •Concentration of niacinamide in EQQUALBERRY Vitamin Illuminating Serum is undisclosed; efficacy depends on it reaching roughly 2-5%.
- •Tetrahexyldecyl ascorbate stability in Sunday Riley C.E.O. 15% Vitamin C Brightening Serum's formula is not verifiable without knowing pH and packaging type.
- •Glycolic acid concentration in Sunday Riley C.E.O. 15% Vitamin C Brightening Serum is undisclosed; low levels may exfoliate minimally.
- •Four citrus-derived fragrance ingredients in Sunday Riley C.E.O. 15% Vitamin C Brightening Serum may cause photosensitivity or contact reactions in some users.
- •Ceramide NP appears mid-list in EQQUALBERRY Vitamin Illuminating Serum, so its concentration may be low and barrier benefit limited.
- •Sunday Riley C.E.O. 15% Vitamin C Brightening Serum contains two preservatives (phenoxyethanol and chlorphenesin), which may not suit highly reactive skin.
Analysis generated from both INCI lists using Claude. Ingredient order indicates relative concentration; exact percentages are usually undisclosed.
Who It's Designed For
- Those looking to address uneven skin tone and dark spots
- Users who want vitamin C benefits without L-ascorbic acid irritation
- Sensitive skin types seeking a fragrance-free brightening serum
- People who prefer lightweight, non-sticky serum textures
- Those interested in barrier support alongside brightening actives
- K-beauty enthusiasts looking for a multi-functional serum
- 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
Key Ingredients
40% Acerola Fruit Water, 4% Niacinamide, 2% Arbutin, 5 types of Ceramides, 8 types of Hyaluronic Acid
15% Tetrahexyldecyl Ascorbate (THD Ascorbate), Squalane, Glycolic Acid, Tocopherol (Vitamin E), Saccharide Isomerate
Product Composition
23% similarity (14 ingredients in common)
Only in EQQUALBERRY (31)▾
Only in Sunday Riley (15)▾
User Feedback Patterns
Users consistently praise the serum for being lightweight and non-sticky. Several reviewers specifically note it absorbs quickly, unlike typical vitamin C serums.
Many users report improved skin tone and reduced dark spots within 2 to 4 weeks of consistent use. The brand cites an Intertek study showing 57.49% melanin area reduction in one week, though the full study methodology is not publicly available.
At 30ml, several users note the bottle runs out quickly, especially with daily use on face, neck, and body as suggested by the brand.
Some users report minimal visible change after several weeks. Most negative reviews cite underwhelming brightening results rather than irritation or breakouts.
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.
Which Should You Buy?
EQQUALBERRY Vitamin Illuminating Serum 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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